CN101173638A - Fuel injection controller and diagnosis method of fuel supply system - Google Patents

Abstract

A fuel injection controller (incorporated in an engine control ECU) for controlling an injection operation of an injector has a program for executing injections in plural injection patterns including an injection pattern of a multiple injection in a certain order into a certain cylinder of the engine during non-injection operation and a program for obtaining sums of fluctuation degrees of an engine operating condition due to all the injections in a first injection unit composed of one (single stage injection) of the plural patterns and all the injections in a second injection unit composed of a different one (multiple injection of two stages) of the plural patterns, which are executed by the former program, with an injection condition (cylinder number and data number N).

Description

The diagnostic method of fuel injection controller and fuel supply system

Technical field

The present invention relates to a kind of fuel injection controller that is used to control the injection work of sparger, this sparger sprays and supplies with and is used in the motor burnt fuel, and relates to a kind of whether diagnostic method of the fuel supply system of the motor that comprises sparger of proper functioning of fuel supply system that is used to judge.

Background technique

As everyone knows, for example, the internal-combustion engine that is used for the power source of automobile etc. light and burn from sparger spray and the fuel supplied with to produce the output torque.The diesel engine that is used for automobile etc. adopts a kind of ejecting system recently, and this ejecting system is to carry out secondary so-called multi-injection system of spraying carrying out to use before and after the main injection less than the emitted dose of main injection, and produces the output torque in a burn cycle.For example, now when fuel combustion the increase of noise or NOx discharge amount be counted as problem.In order to address this problem, exist in main injection is carried out pre-spray or secondary injection before with small amount of fuel situation.In addition, exist even after main injection,, carry out the situation that spray the back at injection timing near main injection for the activation of diffusive combustion or the minimizing of particulate matter (PM) effulent.In addition, exist in order to improve exhaust gas temperature, by the activation of catalyzer such as minimizing reduction composition supply, the situation of after significantly the injection timing of delay is carried out with main injection, spraying.Recent engine control adopts the combination of a kind of or any kind in these various injections to carry out fuel supply to motor in being more suitable for the jet mode of various situations (jet model).

Usually, in order to control the injection work of sparger, exist widely used fuel injection controller to carry out multi-injection.This controller uses arteries and veins spectrogram, has write the jet model (adopted value) that is used for each engine condition or its mathematic(al) representation to set jet model according to engine condition at every turn in this arteries and veins spectrogram.This controller keeps waiting by experiment the optimal mode about each engine condition (adopted value) (for example, store and remain among the ROM) that presupposes as arteries and veins spectrogram or mathematic(al) representation of acquisition.This controller is with reference to arteries and veins spectrogram or mathematic(al) representation and therefore set jet model according to engine condition.In addition, as the controller of explanation in the patent documentation 1 (JP-A-2005-264810), a kind of controller that changes jet model by the monitor engine operating conditions has been proposed.

Even having write the use of such arteries and veins spectrogram of adopted value or its mathematic(al) representation makes in the jet mode (jet model) that is being suitable for engine condition under the situation of spraying (just main injection) under each situation at multi-injection as in single-stage fuel supply to motor.Yet inventor of the present invention has confirmed by using such controller to carry out under the situation of multi-injection, because the continuous injection of carrying out in very short interval, becomes bigger than what spray in single-stage with respect to the departure of target engine operating conditions.For example, each injection of carrying out continuously (in particular, using the pair that is different from the main injection small amount of fuel to spray) is subjected to by the various influences of carrying out the injection generation before and after that time sprayed.Be the influence of the spray characteristic of sparger one of in them, in particular, its individual difference.

For example, under for the mass-produced situation of each element in the mass selling engine control system, individual difference to a certain degree usually between the motor or even situation at multicylinder engine under exist in the characteristic of each control unit that comprises sparger between cylinder.Under mass-produced situation, each element of considering its individual difference (for example, all a large amount of cylinders of producing and carry on vehicle) adopted value (best jet model) fixes on really and needs too many time and too many work in the present production system, and is therefore, unrealistic.Therefore, even write in use under the situation of arteries and veins spectrogram of adopted value or mathematic(al) representation, very difficult execution consider individual difference influential control.

In addition, inventor of the present invention is verified still under the situation of above-mentioned multi-injection, is different from the situation that single-stage is sprayed, and except that common injection characteristics, is subjected to the influence of individual difference about the spray characteristic of multi-injection (repeatedly continuous sparger).Therefore, except that single-stage is sprayed, in order to obtain the target engine operating conditions, by need consider the spray characteristic of multi-injection with high-precision multi-injection.Therefore, in comprising above-mentioned patent documentation 1, in traditional controller of controller of explanation, be difficult to carry out accurately the control of engine condition, especially be used under the situation of control of multi-injection at controller.

Carrying out under the situation of spraying control with high precision, because the characteristic variations of the aging grade of control unit can not be ignored.In comprising above-mentioned patent documentation 1 in traditional controller of controller of explanation,, but can not know the influence of characteristic variations subsequently even obtained optimum value with highi degree of accuracy in the starting stage.Therefore, process in time may take place to depart from optimum value.In this case, may adopt in advance value by experiment etc. to obtain the scheme of decline coefficient (with the relevant coefficient of aging decline degree) of adopted value with arteries and veins spectrogram or mathematic(al) representation processing adopted value.Yet, even since the existence of the above-mentioned individual difference that changes about such aging characteristics of each parts also be difficult to eliminate the effects of the act fully.

Summary of the invention

Target of the present invention provide a kind of fuel injection controller and can obtain to comprise at every turn the spray characteristic that aging characteristics change fuel supply system diagnostic method with by multi-injection with high precision acquisition target engine operating conditions.

According to an aspect of the present invention, a kind of be used for controlling spraying and supplying with the fuel injection controller that is used in the injection work of the sparger of motor burnt fuel have the actuating device of injection and fluctuation degree acquisition device.Spray actuating device and carry out the injection of a plurality of jet models, described a plurality of jet models comprise at least carrying out under the state of non-injection work with the jet model of a particular order to the multi-injection of specific engines cylinder at specific cylinder as one of executive condition at least.The fluctuation degree obtains device and obtains at least owing to comprise first injection unit of of a plurality of jet models or combination and comprise summation or its equivalents of the fluctuation degree of the engine condition in second injection unit of not same or its combination in a plurality of models of injection conditions.

Spray characteristic about above-mentioned multi-injection (repeatedly continuous injection) is different between jet model (jet model of sparger).Promptly, for example, be applied to fluctuation degree (spraying the undulate quantity of the engine condition that causes by the fuel) difference on the engine condition, for example, (for example have between the different jet models that spray progression, the single-stage of a level spray and the multi-injection of two-stage between), have between the jet model of different injection cycles, or have between the multi-injection model of different injection intervals.For example, under the situation of the multi-injection model of two-stage, exist the fluctuation degree (undulate quantity) that sprays the engine condition that causes by the back one-level to spray and switch to positive side or minus side by previous stage.Inventor of the present invention confirms that this moment amount of switched or switching direction (positive side or minus side) depends on the injection timing (beginning/ends) or the injection cycle of each injection (previous stage is sprayed and the back one-level is sprayed), sprays injection interval between (previous stage spray and after one-level injection) etc. and changes.

Inventor of the present invention considered these problems and invented above-mentioned controller, as can determine the controller about the spray characteristic of multi-injection of (acquisition) reflection aging characteristics variation etc. at every turn.In this scheme, the fluctuation degree obtain device can obtain about a plurality of models (in a plurality of jet models one or in conjunction with and a plurality of jet model in not same model or in conjunction with) summation or its equivalents (owing to being included in the fluctuation degree of all injections in the injection unit) of fluctuation degree of engine condition of each injection unit.Therefore the summation of the fluctuation degree of the engine condition that obtains or its equivalents (hereinafter, being called the fluctuation parameter) show the fluctuation degree of the engine condition that is caused by each model (or combination of model) and are the indexs that is used to control engine condition.The fluctuation parameter total emitted dose with injection by all injections in the injection unit basically is relevant.Therefore, according to such scheme, the fluctuation parameter is to obtain with injection conditions (for example, about at least one cylinder number of spraying, jet pressure sprays progression, injection timing, injection cycle, injection interval etc.).As a result, can obtain each spray characteristic.By this way, can be easily and accurately carry out the correction of data analysis by data accumulation and spray characteristic or comprise the fault diagnosis of the fuel supply system of sparger.

Under the situation of each acquisition spray characteristic, the comparison of the fluctuation parameter of execution injection unit (corresponding in the jet model or combination) (for example, comparison that begins by the user or the comparison of automatically carrying out by a certain device) be effective, if desired, after the fluctuation parameter is changed in the processing before comparison.By this way, another of injection unit based on the comparison may obtain the degree of deviation (for example, difference, ratio etc.) of one fluctuation parameter in the injection unit of comparison.In addition, based on the degree of deviation of fluctuation between the parameter, may obtain the each spray characteristic spray characteristic of multi-injection (in particular, about).Preferably use another injection unit that has very little error with respect to actual value (that is, having very high inerrancy), reference as a comparison.In such scheme,, can obtain the absolute deviation degree of the fluctuation parameter of an injection unit indirectly by relative deviation degree definite and another injection unit.

Except that engine speed, engine condition can comprise, for example, and by in-cylinder pressure sensor or the detected combustion regime of detonation sensor (relevant) with engine torque.In addition, position in direct engine condition, can use the equivalents of the engine condition that engine condition is shown indirectly, such as (for example by suitable sensor, the NOx sensor) etc. detected concrete discharging composition (for example, NOx) amount or have the behavior (for example, car speed) of the vehicle of motor.In addition, in order accurately to obtain engine condition, these parameters can be used in combination.

According to a further aspect in the invention, the diagnostic method of the fuel supply system of motor obtains to illustrate the drawdown parameter of decreased performance degree of fuel supply system to comprise in the diagnosis motor whether the fuel supply system of the fuel injector that sprays the fueling that is used to burn normally works.Described diagnostic method is carried out the injection of carrying out multiple jet model under the state of non-injection work at the specific cylinder of motor at least, and described a plurality of jet models comprise at least with the jet model of a particular order to the multi-injection of the specific cylinder of motor.Described diagnostic method obtains and relatively owing to comprise all injections in first injection unit of of a plurality of models or combination and comprise summation or its equivalents of fluctuation degree of the engine condition of all injections in second injection unit of not same or combination of a plurality of models.Described diagnostic method obtains by comparing the degree of deviation between the summation, as drawdown parameter.

This method makes it possible to obtain the degree of deviation as the fluctuation parameter of drawdown parameter.May detect the each spray characteristic spray characteristic of multi-injection (in particular, about) based on the degree of deviation.

Description of drawings

Form the specification of the application's part from following all, appended claim, and in the obtaining of accompanying drawing, will be understood that embodiment's feature and advantage, and the method for work of relevant portion and function.In the accompanying drawing:

Fig. 1 shows the schematic representation of the engine control system that comprises fuel injection controller according to an embodiment of the invention;

Fig. 2 shows the flow chart of the basic step of handling according to embodiment's fuel injection control;

Fig. 3 show according to present embodiment about the flow chart of treatment step of executive condition of acquisition process;

Fig. 4 shows the flow chart according to the acquisition process of present embodiment;

Fig. 5 shows the example of the jet model that uses in acquisition process, according to the time diagram of present embodiment about the variation of the fluctuation degree of the engine speed of jet model and engine speed;

Fig. 6 shows the example of the jet model that uses in acquisition process, the time diagram that changes about the fluctuation degree of the engine speed of jet model and engine speed according to present embodiment;

Fig. 7 is the diagram that shows the mode of operation of each cylinder according to embodiment;

Fig. 8 shows the time diagram according to present embodiment variation of the fluctuation degree of engine speed and engine speed before fuel sprays;

Fig. 9 shows the time diagram according to present embodiment variation of the fluctuation degree of engine speed and engine speed after fuel sprays;

Figure 10 shows the flow chart of the pattern of handling according to the correction of present embodiment;

Figure 11 shows the flow chart of another pattern of handling according to the correction of present embodiment; And,

Figure 12 A to 12C shows the time diagram of the correction mode that the correction of Figure 11 handles.

Embodiment

Hereinafter, with reference to accompanying drawing in detail, the fuel injection controller and the diagnostic method of fuel supply system according to an embodiment of the invention will be described.Here, this controller of explanation present embodiment is applied to the automobile (diesel-engine road vehicle) that is equipped with the diesel engine (internal-combustion engine) as power source on it, is equipped with the manually-operable gearbox vehicle of manual transmission (MT) in particular.

At first, by reference Fig. 1, will explain that this controller is applied to the details of the engine system on it.Fig. 1 shows the structural drawing that is applied to the schematic structure of the vehicle engine control system on it according to the fuel injection controller of present embodiment.Suppose the motor of multi-cylinder Reciprocating engine, but among Fig. 1, for convenience of description, only show a cylinder (in cylinder #1 to #4) as present embodiment.As shown in Figure 1, engine control system has been applied to as the configuration of control target on the reciprocal diesel engine 10 of common rail type fuel injection controller, and in order to control motor 10, this engine control system is by various sensors, ECU 50 formations such as (electronic control units).Here, constitute basically as the motor 10 of control target, thereby piston 13 is contained in each cylinder 11 (only showing a cylinder for convenience's sake) that is formed by cylinder block.Piston 13 is connected to bent axle 15 as the output shaft of motor 10 via connecting rod 14.The burning of light oil causes the sequenced to-and-fro motion of the piston 13 in each cylinder among the firing chamber 11a of cylinder 11, causes the rotation of the bent axle 15 that piston 13 has thus.

For the firing chamber 11a of cylinder 11 provides suction tude (gas-entered passageway) and outlet pipe (exhaust passage), thus suction tude and outlet pipe are communicated with firing chamber 11a and its attachment portion (opening) by suction valve 161 and outlet valve 181 opening/closings.Suction valve 161 and outlet valve 181 is according to being the rotation of the cam that provides of camshaft 16,18 (valve operation of cam axle) and being driven.Camshaft 16,18 mechanically is connected with bent axle 15.The motor 10 of this system be four stroke engine and when bent axle 15 carries out twice rotation (720 ° CA rotate) each camshaft 16,18 once rotate.

As shown in the close larger scale map of ECU 50 in Fig. 1, bent axle 15 has rotor 15a.Rotor 15a has a plurality of test section 15b (tooth).Tooth 15b substantially equally spaced (being 30 ° of CA in the present embodiment) is formed on that rotor 15a goes up and provides tooth movable part 15c on a position at the interval of rotor 15a.The crank angle sensor 41 that is used for detection of engine rotating speed (rotating speed that is equal to bent axle 15) etc. be configured in bent axle 15 near.For example, crank angle sensor 41 comprises the electromagnetism pick-up transducers of passing through that is used for detecting continuously tooth 15b.In the detection of engine rotating speed,, detect passing through of tooth 15b continuously by crank angle sensor 41 owing to the rotor 15a that comprises tooth 15b is rotated by the rotation of bent axle 15.Therefore, sensor-based output can detect the angular coordinates or the rotating speed of bent axle 15.

The camshaft 16 that is used to drive suction valve 161 has rotor 16a.Rotor 16a also has a plurality of test section 16b (tooth).Among Fig. 1, show the example of the rotor 16a that uniformly-spaced forms with four tooth 16b.The cam-angle sensor 42 (so-called G sensor) that is used for discerning cylinder etc. is provided near camshaft 16.For example, cam-angle sensor 42 comprises electromagnetism pick-up transducers etc.In the identification cylinder, by continuously with cam-angle sensor 42 detection tooth 16b pass through can identification of Engine 10 cylinder (can discern in four cylinders).

Bent axle 15 also mechanically is connected (on the way Yun Hang wheel of vehicle) via the clutch as the manual transmission (MT) 21 of manually-operable type of variator with driving wheel.That is, when the driver artificially breaks away from the clutch of MT21, being connected and can mechanically being cut off between bent axle 15 and the driving wheel.The driver is a gear-change operation part 23 by its part of carrying out the shift pattern operation.Shift pattern with the operation change MT21 of gear-change operation part 23.Gear-change operation part 23 has the shift pattern sensor 23a that is used to detect the gear-change operation position.

For the firing chamber 11a of cylinder 11 be provided for injection/supply be used for firing chamber 11a burnt fuel (light oil), as Electromagnetic Drive type (or pressure-driven type) sparger 19.Sparger 19 passes to needle-valve to cause the to-and-fro motion of needle-valve via hydraulic pressure cavity with driving force, opens and closes sparger 19 like this.Here, explain for convenience, only show the sparger 19 that is configured in the cylinder (cylinder 11), but such sparger is configured in each cylinder of motor 10.

The sparger of each motor 10 is connected on the common rail 31 as the accumulator delivery pipe via high-pressure delivery pipe.Rail 31 has the common rail pressure sensor 31a that can detect the fuel pressure (common rail pressure) in the common rail 31 that is arranged in wherein altogether.Provide Electromagnetic Drive type (or mechanical type) reduction valve (not shown) for being total to rail 31.When the common rail pressure transition increased, this reduction valve was opened to reduce pressure.

The high-pressure service pump 33 of supply pump of acting as a fuel is connected to common rail 31.The Electromagnetic Drive type sucks the fuel suction part that control valve (SCV) 33a is configured in high-pressure service pump 33.In fuel supply system, be inhaled into the fuel chambers of high-pressure service pump 33 via suction control valve 33a from the low-pressure fuel of fuel tank 37 suctions by supply pump 35.Fuel under high pressure accumulates in the common rail 31 from the fuel under high pressure that high-pressure service pump 33 supplies to common rail 31 continuously and is equal to jet pressure.High-pressure service pump 33 repeats to suck and discharge fuel by the live axle relevant with the rotation of bent axle 15.For example, live axle becomes 1/1 or 1/2 ratio rotation with the rotating speed with bent axle 15.

In the motor 10, the fuel that therefore accumulates in common rail 31 sprays and supplies to each cylinder by opening as the valve of the sparger 19 of needs to drive with prearranging quatity.During engine operation, from the air inlet of suction tude by suction valve 161 open firing chamber 11a that motion imports cylinder 11 and with the fuel mix of spraying and supplying with from sparger 19.Mixture is by 13 compressions of the piston in the cylinder 11, thus mixture ignition (via spontaneous combustion) and burning.The exhaust that produces by burning is discharged to outlet pipe by the motion of opening of outlet valve 181.

The parts of mainly carrying out engine control as electronic control unit in such system are ECU 50.ECU 50 is formed by well-known microcomputer 60.ECU 50 obtains the engine condition of motors 10 and carries out each control about motor 10 to user's request and in response to each actuator of condition control such as sparger 19 and for each situation in the optimal mode request based on each sensor signal.Be contained in microcomputer 60 on the ECU 50 basically by each computing device, storage device, formation such as communication device, such as the CPU that is used to carry out various calculating (basic actuating device) 62, in order to be stored in the data in the computational process or the RAM (random access memory as main memory of result of calculation temporarily, not shown), ROM (ROM (read-only memory)) 64 as program storage, as the EEPROM (rewritable non-volatile storage electrically) 66 of data storage, backup RAM (not shown) (by RAM) such as the standby power supply energising of Vehicular battery and for from/to the input/output port (not shown) of the outside input/output signal of microcomputer 60.Comprise that fuel sprays the fuel that obtains control and sprays each program about engine control of obtaining program 64a, control arteries and veins spectrogram etc. is stored among the ROM 64 in advance.Each control data etc. that comprises the design data of motor 10 is stored in the data storage (EEPROM 66) in advance.

System according to present embodiment obtains (renewal) correction factor to proofread and correct (passing through feedback compensation) owing to above-mentioned individual difference according to each situation continuously, and aging the variation waited the departure that produces.Then, with reference to Fig. 2, with the basic handling step of explaining according to the fuel injection control of present embodiment.The value of the various parameters of in the processing of Fig. 2, using be stored on demand be installed among the ECU 50 such as RAM, EEPROM, or the backup RAM storage device in and when needs, upgrade at any time.By carrying out the program that is stored among the ROM,, carry out a series of processing in each figure continuously in each predetermined crank angle or the predetermined time cycle of each cylinder of motor 10 with ECU 50.

As shown in Figure 2, in a series of processing,, read various parameters such as the expression engine condition of engine speed (mean speed) or engine loading at first at S11.Then in S12,, set jet model based on the engine condition that reads at S11 or the amount of depression that provides by the driver (or if desired computation requests engine behavior) respectively.Obtain jet model based on (for example, store and remain among the ROM 64) such as specific arteries and veins spectrograms.At length, by obtain best model (adopted value) about the experiment of each engine condition of presupposing etc.Therefore, the relation between engine condition and the best model is written into arteries and veins spectrogram (or limit with mathematic(al) representation).By such as spraying progression (discharge time number), injection timing, the parameter of injection cycle and injection interval (injection interval under the situation of multi-injection) limits jet model.At S12, according to each engine condition (obtaining in S11), best model (adopted value) is set at and satisfies the request engine condition.For example, according to request torque etc. be set in changeably under the situation that single-stage sprays emitted dose (injection cycle) or under the situation of the jet model of multi-injection the summation of the emitted dose of each time injection.Based on the bid value (command signal QFIN) of jet model setting to sparger 19.Therefore,, carry out above-mentioned pre-spray, pilot injection, after injection, back injection etc. with main injection according to the state of vehicle.

Then,, read by obtaining the correction factor LV that handle to upgrade and then separately,, proofread and correct bid value (command signal QFIN) sparger 19 based on the correction factor LV that reads at S14 from EEPROM 66 at S13.In addition, in following S15, determine about spraying progression injection timing, injection cycle, the bid value of injection interval etc. and based on the driving of bid value control sparger 19 based on corrective command value (command signal QFIN).

Then, with reference to Fig. 3 to 12, the obtaining mode (more new mode) of the correction factor LV that uses among the S14 of Fig. 2 will be described in detail in.At Fig. 3, the value of the various parameters that some row shown in 4,10 and 11 use in handling be stored on demand be installed among the ECU 50 such as RAM, EEPROM, or in the storage device of backup RAM and when needs, upgrade at any time.Substantially by being stored in the program among the ROM with ECU 50 execution,, carry out a series of processing in each figure continuously in each predetermined crank angle or the predetermined time cycle of each cylinder of motor 10.

The processing of being obtained (renewal) correction factor LV by the device (ECU 50) of present embodiment is made of following two processing basically.

(1) obtains processing: about the injection of particular spray model, obtain since be included in all injections in the jet model engine condition the fluctuation degree summation (hereinafter, be called the fluctuation parameter) and the fluctuation parameter that is obtained be stored in such as (here, EEPROM 66) in the relevant particular memory device of the injection conditions of each jet model.

(2) proofread and correct processing:, upgrade the correction factor of the fuel supply (fuel injection) that is stored in (EEPROM 66) in the particular memory device in advance here, based on handling the fluctuation parameter that is stored in the storage device by obtaining.

Then, with reference to Fig. 3 and Fig. 4, processing is obtained in detailed description by main.Fig. 3 and 4 is flow charts that the treatment step that obtains processing is shown.At length, in the processing shown in Figure 3, determine whether to satisfy and obtain the executive condition (obtaining executive condition) of processing.Have only when satisfying executive condition, carry out the processing of obtaining of as shown in Figure 4 a series of processing.

As shown in Figure 3, in the processing of Fig. 3,, determine whether to satisfy following each condition at first at S21:

(1) condition of jet pressure (common rail pressure) in prespecified range.By detection jet pressures such as common rail pressure sensor 31a.

(2) condition of the rotational speed N E of motor 10 (rotating speed of bent axle 15) in prespecified range.By detection of engine rotational speed N E such as crank angle sensors 41.

(3) motor is not in the condition of transient working condition.For example, when the deviation (rotating speed deviation) of engine speed NE less than predetermined threshold (for example, 100rpm) and the deviation (accelerator deviation) of same amount of depression during, determine that motor 10 is not in the transient working condition less than predetermined threshold (for example, 5%).By will (for example measuring and be stored in storage device before, RAM) value, comparing to obtain the deviation of each engine speed and amount of depression as the absolute value of the difference between the measured value with current measured value (currency) (that is, by deduct above-mentioned value from currency).

(4) motor 10 is carried out the condition of non-injection work (that is, motor 10 is slowing down).If the volume under pressure of accelerator pedal was set at zero (non-pressed status) then carries out fuel cut-off (non-injection work) when motor 10 entered deceleration regime and motor 10 fully quickens in overall engine control.In the present embodiment, carry out fuel cut-off control.

(5) be normal condition about each sensor that obtains processing.

In following S22, determine whether the satisfied executive condition that obtains based on definite result at S21.At length, determine whether to satisfy simultaneously above-mentioned condition (1) to (5) at S22.If S22 is for being then to determine to satisfy executive condition.In this case, in following S221, obtain the permission mark and be set at 1 (F=1).After this, a series of processing among Fig. 3 finish.If even S22 determines one in the discontented group all conditions (1) to (5), then determine discontented group executive condition.In this case, in S220, obtain the permission mark and be set at 0 (F=0).After this, a series of processing among Fig. 3 finish.

In processing shown in Figure 4, the processing that repeats S31 is till satisfying executive condition.At S31, determine whether to satisfy executive condition, that is, whether obtain the permission flag F and be set at 1.When obtain by a series of processing among Fig. 3 the permission flag F be set at 1 and S31 determine to obtain the permission flag F when being set at 1, handle forwarding S32 to.At S32, based on setting jet models such as particular table (one dimension arteries and veins spectrogram).At length, in this table, the jet model that each data label N (initial value is 1) is limited in the proper functioning of motor 10 and equal the jet model (control arteries and veins spectrogram) that (or corresponding to) use in control (sprays progression (discharge time number), injection timing, injection cycle, injection interval etc.).That is, in carrying out for the first time, based on the jet model of table setting data numbering 1.

In following S33, based on the jet model of setting at S32, fuel is injected in four cylinder #1 to #4 of motor 10 the concrete cylinder (for example, the first cylinder #1) as target.Carrying out fuel by sparger 19 sprays.At following S34, calculating is owing to the summation (hereinafter, being called the parameter that fluctuates) and the fluctuation parameter that calculates of the fluctuation degree of the injection of carrying out at S33 (all injections) engine condition are stored among the EEPROM 66 with data number N.Calculate the fluctuation parameter based on the detected engine speed NE of each difference (for example, at 720 ° of CA in the cycle).

In following S35, the counter M (M=M+1) of the quantity of carrying out number of times is sprayed in the expression that adds up.The initial value of counter M is 0.In following S36,, determine whether injection carries out a special time number of times (=threshold value SH) by counter M and predetermined threshold SH (for example, 10) are compared.When the value of determining counter M at S36 during less than threshold value SH (M＜threshold value SH), some row that stop immediately among Fig. 4 are handled.After this, obtain executive condition,, carry out the increase that fuel sprays sum counter M in proper order by that in this processing via S31 to S35 if still satisfy.Therefore repeatedly carry out the processing of S31 to S35, be injected into a special time number of times (=threshold value SH) up to execution.About a jet model (model of data number N), carry out the injection of specific times and the particular number (threshold value SH) of fluctuation parameter and be stored among the EEPROM 66.Then, determine that at S36 the value of counter M is equal to or greater than threshold value SH (M＞=threshold value SH) and processing forwards following S37 to.

When the particular number (=threshold value SH) that therefore obtains about the fluctuation parameter of the jet model of data number 1, then in order to obtain particular number (=threshold value SH), at S37 cumulative data numbering N about the fluctuation parameter of the jet model of data number 2.In following S38, reset and obtain permission flag F sum counter M and stop a series of processing among Fig. 4 immediately.After this, obtain executive condition if still satisfy, via the processing of S31 to S37, acquisition is about the fluctuation parameter of the specific times (=threshold value SH) of the jet model of data number 2 once more.

At present embodiment, carry out aforesaid fuel continuously and spray based on each jet model that in table, limits in advance.Acquisition is stored owing to the summation (fluctuation parameter) of the fluctuation degree of the engine condition of the injection (all in model are sprayed) of each jet model and with injection conditions (the data number N of expression jet model).

Then, by reference Fig. 5 and 6, with the fuel jet model by handling in the interpretation maps 4.The example of the jet model that Fig. 5 and 6 each S32 that show at Fig. 4 set and because near the engine condition (NE) of jet model injection timing and the variation of fluctuation parameter (NE).Shown in each figure, each example all detects the engine speed NE as engine condition.In the present embodiment, the injection shown in the execution graph 5 is as the jet model of data number 1, and after this, the injection shown in the execution graph 6 is as the jet model of data number 2.

At first, will the jet model of data number 1 be described by with reference to Fig. 5.Among Fig. 5, QFIN represents to spray order (to the command signal of sparger 19), and R represents Spraying rate (fuel quantity that time per unit sprays).Shown in solid line L1 and L2 among Fig. 5, this jet model is to spray with the single-stage of the small amount of fuel of an ejector stage.At length, this model sprays and finishes timing t2 by having injection beginning timing t1, and short injection cycle T1 (=t2-t1) injection constitutes.When carrying out injection, obtain the Spraying rate characteristic R that represents by the solid line L2 among Fig. 5 by the injection order QFIN (pulse width equals the energising cycle of sparger 19) that represents by the solid line L1 among Fig. 5.As a result, be injected in the fuel quantity of representing by region R 1 among the Spraying rate characteristic R (emitted dose).In real engine control, do not measure Spraying rate characteristic R.When needs Spraying rate characteristic, for example can estimate based on command signal QFIN.In addition, by using known in-cylinder pressure sensor, may directly determine to comprise that with highi degree of accuracy actual ejection begins timing and sprays the Spraying rate characteristic R that finishes timing.When spraying, produce the mobile delay of sparger 19.That is, the fuel from the timing (rising edge of the pulse QFIN shown in Fig. 5 or decay edge) of order to timing that begins or sparger 19 sprays finishing of moving (execution that the fuel shown in the Spraying rate R of Fig. 5 sprays or stop) certain delay takes place.

In such injection, engine speed NE from as the value of the non-injection represented by the dotted line L3a Fig. 5 be changed to the value of representing by solid line L3.Among Fig. 5, the fluctuation model of engine speed NE is expressed as because the variation of the summation of the fluctuation degree of the engine speed NE of this injection (fluctuation parameter Δ NE).As shown in Figure 5, by about the injection in the jet model of data number 1, from non-injection stable between deceleration period, engine speed NE takes place just to fluctuate.That is the value when, taking place from non-injection theed represent by the dotted line L4a Fig. 5 is to the fluctuation of the value of being represented by solid line L4.

Then, by reference Fig. 6, with the jet model of explanation data number 2.Among Fig. 6, QFIN represents to spray order and R represents Spraying rate.Δ ne is illustrated in the multi-injection of time diagram the influence to the fluctuation degree (undulate quantity) of the engine condition that is caused by subsequently injection by jet-action last time among Fig. 6.

Shown in solid line L11 and L12 among Fig. 6, this jet model is the multi-injection of two levels of a small amount of fuel injection.(cycles of 720 ° of CA) execution previous stage is sprayed and back one-level injection in a burning cycle.At length, jet model by have injection beginning timing t11, spray to finish timing t12 and short injection cycle T11 (=t12-t11) previous stage is sprayed (first order injections) and is had injection beginning timing t14, sprays and finish timing t15, and short injection cycle T12 (=t15-t14) back one-level is sprayed (afterbody injection) formation.Injection interval between two injections is set in injection interval IBL place shown in Figure 6.Each injection of previous stage and back one-level all is set at the identical model as the jet model of data number 1, promptly, be set with injection beginning timing t1 (=t11=t14), spray to finish timing t2 (=t12=t15), and injection cycle T1 (=T11=T12) jet model.

Spray if use the injection order QFIN that represents by the solid line L11 among Fig. 6 to carry out, then obtain the Spraying rate characteristic R that represents by the solid line L12 among Fig. 6.As a result, be injected in the injection of the fuel quantity (emitted dose) represented by region R 11 and R12 among the Spraying rate characteristic R as previous stage and back one-level.Mobile delay in the sparger 19 equally also takes place in previous stage and back one-level injection.

In such injection, engine speed NE from as the value of the non-injection represented by the dotted line L13a Fig. 6 be changed to the value of representing by solid line L3.Among Fig. 6, the fluctuation model of engine speed NE is expressed as owing to the whole injections (injection of previous stage and back one-level) that are included in the jet model, the variation of the summation of the fluctuation degree of engine speed NE (fluctuation parameter Δ NE).

As shown in Figure 6, equally in this case, because corresponding to the injection of all jet models of data number 2, from non-injection stable between deceleration period, engine speed NE takes place just to fluctuate.That is the value when, taking place from non-injection theed represent by the dotted line L14a Fig. 6 is to the fluctuation of the value of being represented by solid line L14.In the jet model of data number 2, spray owing to carry out previous stage, the fluctuation degree (undulate quantity) that existence is sprayed the engine condition that causes by the back one-level switches situation of (that is change) extremely positive side or minus side.The solid line L10 that the end (at moment t13) of spraying from previous stage among Fig. 6 takes place represents degree of the influence Δ ne (surge characteristic) that previous stage is sprayed.Characteristic shown in Fig. 6, that is, because previous stage is sprayed, the amount of switched of back one-level spray characteristic or switching direction (positive side or minus side), according to twice injection (previous stage is sprayed and the back one-level is sprayed) injection timing (beginning and finish), injection cycle, injection interval etc. and changing.

Then, by reference Fig. 7 to 9, with the computation schema of explanation at the fluctuation parameter Δ NE at the S34 place of Fig. 4.At first, by reference Fig. 7, will the mode of operation of each cylinder #1 to #4 (first cylinder to the four-cylinder) of motor 10 be described.Fig. 7 shows the burning cycle and the position of the bent axle 15 of the progress of following burning cycle and the variation of engine speed NE of cylinder #1 to #4.Owing to obtain the execution of processing, suppose the state of fuel cut-off (non-injection), in Fig. 7, omitted combustion stroke.Among Fig. 7, for convenience of explanation, ignored because the minimizing of the engine speed NE of fuel cut-off.As shown in Figure 7, in motor 10, carry out formation aspirating stroke (INTA), compression stroke (COMP), the burning cycle of four strokes of combustion stroke and exhaust stroke (EXHA) in the cycle continuously at 720 ° of CA as four stroke engine.According to shifting to an earlier date of burning cycle, near (crank position=summit) near the TDC of each cylinder (upper dead center), engine speed NE periodically becomes minimum.

Then, by reference Fig. 8 and 9, will detecting pattern and the computation schema of the fluctuation degree Δ NE of engine speed NE be described.Fig. 8 and 9 is each time diagram that show the variation of engine speed NE and its fluctuation degree (parameter that fluctuates Δ NE) before and after the fuel at the S33 place of execution graph 4 sprays.Here, show because fuel cut-off comprises the variation of engine speed NE of minimizing of the amount of engine speed NE.Each TDC (upper dead center) of the first and the 3rd cylinder is represented in each timing of being represented by #1 and #3 in each accompanying drawing.

As shown in Figure 8, in the present embodiment, detect each engine speed NE in the cycle at 720 ° of CA.At length, at moment t21 corresponding to the TDC of the 3rd cylinder #3, t22, t23, t24 obtains engine speed NE (t21), NE (t22), NE (t23), NE (t24) and calculate each fluctuation parameter Δ NE based on each engine speed NE.

By the rotating speed of crank angle sensor 41 detected bent axles 15, can detect each engine speed NE based on for example continuously.By using highi degree of accuracy detection of engine rotational speed N E too by the rotating speed of cam-angle sensor 42 detected camshafts 16.In the present embodiment, based on one in the rotating speed of bent axle 15 and camshaft 16 rotating speeds or both (at 720 ° of CA in the cycle) detection of engine rotational speed N E continuously.This moment in addition, based on the angle of rotation of the angle of rotation of the synchronization-moving valve operation of cam axle 16 of the suction valve 161 (or outlet valve) of motor 10 or the bent axle 15 that is connected with valve operation of cam axle 16, determine whether to arrive detection time of engine speed NE.Determine detection of engine rotational speed N E when determining the detection time of arrival engine speed based on this.

Then, by the situation after spraying with fuel shown in Figure 9 as an example in detail, the computation schema of fluctuation parameter Δ NE will be described.Fig. 9 as shown in Figure 9, in this example, above-mentioned injection (at the S33 place of Fig. 4), that is, the fuel that the moment t23a before moment t23 carries out the first cylinder #1 sprays.Injection timing t23a in this example is corresponding to the TDC as the first cylinder #1 that sprays target.For example, under the situation of carrying out single-stage injection shown in Figure 5, thereby the mobile delay of considering sparger 19 is set injection beginning timing t1 actual ejection starting point near TDC.Under the situation of carrying out multistage injection shown in Figure 6, set injection starting point that injection beginning timing t14 sprays (spraying corresponding to afterbody) from one-level then near TDC.

Because this injection, the variation of the engine speed NE behind the t23a constantly is not that the diagram by the non-injection among Fig. 8 illustrates (that is, by the diagram shown in the double dot dash line among Fig. 9), but by the graphic representation shown in the realization L21 among Fig. 9, that is, reacted the diagram of the influence of spraying.In this example, according to obtain at the moment t21 t22, the engine speed NE of t23 t24 (t21), NE (t22), NE (t23), NE (t24) by the diagram shown in the solid line L21 among Fig. 9.In the present embodiment, the engine speed NE based on each acquisition calculates at the fluctuation parameter Δ NE of 720 ° of CA in the cycle according to following formula (formula 1).

(formula 1)

ΔNE＝ΔNE2a-ΔNE2≈[(ΔNE1+ΔNE3)/2]-ΔNE2

In formula 1, according to following formula (formula 2), by engine speed NE ' (t23) and above-mentioned engine speed NE (t21)-NE (t24) limit the fluctuation degree Δ NE1 of engine speed NE, Δ NE2, Δ NE2a, Δ NE3.

(formula 2)

ΔNE1＝NE(t21)-NE(t22)，

ΔNE2＝NE(t22)-NE(t23)，

ΔNE2a＝NE(t22)-NE’(t23)，

ΔNE3＝NE(t23)-NE(t24)

Under non-injection situation (L22 illustrates by double dot dash line) engine speed NE ' (t23) corresponding to the engine speed NE of moment t23 and in order roughly to calculate fluctuation parameter Δ NE actual set.

As shown in Equation 1, in the present embodiment, because in the injection (comprising whole injections of jet model) that the S33 of Fig. 4 carries out, fluctuation parameter Δ NE be calculated as the rotating speed after the injection detect the practical engine speeds NE (t23) of t23 (by realizing that L21 represents) constantly and the engine speed NE ' of (L22 represents by double dot dash line) under the non-injection situation (t23) between difference (NE (t23)-NE ' (t23)).Because the engine speed NE ' that can not directly detect actual set (t23), generally calculation engine rotational speed N E ' is (t23) for fluctuation degree Δ NE1 by using the engine speed NE in the burning cycle before spraying and the fluctuation degree Δ NE3 (as shown in Equation 1) that sprays engine speed NE in the after-combustion cycle.

In the present embodiment, therefore the fluctuation parameter Δ NE that obtains is converted to energy equivalent to obtain the fluctuation parameter (fluctuation parameter Δ E) as energy value according to formula 3.

(formula 3)

ΔE＝1θ＝I×(ΔNE/Δt)

In the formula 3, I represents rotary inertia and is substantially limited by the design load of motor 10 (flywheel etc.) in particular.The value that Δ NE/ Δ t obtains corresponding to the second differential of the angular velocity θ (engine speed NE) that sprays.Δ t detects the time of t23 constantly corresponding to the rotating speed after extremely spraying from injection timing t23a.Therefore, in this example, obtain time Δ t as bent axle 15 TDC 180 ° of times that CA is required of rotation from TDC to the three cylinder #3 of the first cylinder #1.That is, time Δ t can be by following by using from formula 4 expressions of the engine speed NE that sprays.

(formula 4)

Δt＝(180/360)/NE＝1/(2NE)

Therefore, in the present embodiment, detect each engine speed NE in the cycle at 720 ° of CA.At the S33 of Fig. 4, carry out injection and, calculate the fluctuation parameter of each jet model shown in each in Fig. 5 and Fig. 6 at following S34 with the pattern of each among Fig. 5 and Fig. 6.When calculating the fluctuation parameter, at first, use formula 1 by profit, obtain fluctuation parameter Δ NE based on the fluctuation degree Δ NE1 of each detected engine speed NE in the cycle of 720 ° of CA to Δ NE3.Then, by using formula 3, fluctuation parameter Δ NE is converted to energy equivalent to obtain the fluctuation parameter Δ E as energy value.

At S34, because all injections (are sprayed in data number 1 situation next time, and twice injection under the situation of data number 2), repeatedly obtain the summation of the fluctuation degree (fluctuation parameter Δ E) of engine condition for each jet model ( data number 1 or 2).For each jet model, the fluctuation parameter Δ E of the numerical value of the threshold value SH that exists in Fig. 4 (for example, 10 fluctuation parameter Δ E) is stored among the EEPROM 66 with data number N (1 or 2).For each cylinder #1 to #4 obtains fluctuation parameter Δ E and each (number of cylinders) is managed (thereby but identification) individually.More specifically, for example, fluctuation parameter Δ E be classified and be stored in the memory area of preparing into each number of cylinders (for example, a plurality of zones in a plurality of storage devices or the single storage device) thus each data managed to cognizable.

Then, by the main correction processing that will illustrate two types with reference to Figure 10 to 12.Figure 10 and 11 is that each all shows the flow chart of proofreading and correct the treatment step of handling.Equally in each is handled,, at first determine whether to satisfy the executive condition of handling about proofreading and correct (correction executive condition) as under the situation of the processing of Fig. 4.Have only when satisfying executive condition, carry out a series of processing shown in each accompanying drawing.

At first, will explain the pattern of handling (proofreading and correct I) of proofreading and correct by reference Figure 10.As shown in figure 10, in a series of processing,, determine whether to satisfy above-mentioned executive condition at first at S41.When S41 when being, handle forwarding S42 to.This executive condition can at random be set.Here, executive condition is to be stored among the EEPROM 66 such as the data that are used for proofreading and correct (in order to upgrade correction factor) corresponding to the jet model of data number 1,2 fluctuation parameter Δ E (hereinafter, being called data A and data B).Therefore, in the present embodiment, if data A, B is stored among the EEPROM 66, carries out the correction processing of S42 and the step behind the S41.

In proofreading and correct processing, at first, at S42, sense data A from EEPROM 66, B (fluctuation parameter Δ E).In the present embodiment, acquisition equals each data of the numerical value of threshold value SH (Fig. 4).Therefore, obtain each data A, the mean value of B is as end value.For example, when obtaining ten data A (or ten data B), the summation of ten data A (or ten data B) divided by ten to obtain mean value.

In following S43, each final individual data A, B are converted into the value that every scheduled unit sprays number (unit injection progression).For example, the unit injection number is being set under one the situation, the data A (shown in Fig. 5) that maintenance is sprayed corresponding to single-stage, and multiply by 1/2 to obtain the fluctuation parameter Δ E of (level) each time corresponding to the data B (shown in Fig. 6) of the multi-injection of two-stage.

In following S44, at S43 data converted A, B compares with the degree of deviation of two values of acquisition.More specifically, calculate two differences between the value with obtain degree of deviation Δ K (=A-B).At following S45, be updated in the correction factor of using among the S14 of Fig. 2 based on the degree of deviation Δ K that obtains at S44.

For example, upgrade (change) corresponding to the correction factor of the jet model (multi-injection of two-stage) of data number 2 to make data B (data number 2) consistent with data A (data number 1) based on data A (data number 1).More specifically, the degree of deviation Δ Q proportional (Δ K ∝ Δ Q) of the emitted dose between the jet model of basic and data number 1 and data number 2 of degree of deviation Δ K.Therefore, when upgrading correction factor,, for example proofread and correct (increase or reduce) emitted dose by changing about the correction factor (the energising cycle that is equal to sparger 19) of injection cycle for the deviation (degree of deviation Δ Q) that compensates the emitted dose between the jet model.Therefore, can obtain the target engine operating conditions with high precision by multi-injection.

Above-mentioned correction example only is an example.The target of proofreading and correct is not limited to injection cycle (energising cycle).For example, finish timing by injection beginning timing or injection and also can change emitted dose.When spray to finish timing be constant, can change emitted dose by changing the injection beginning timing.When injection beginning timing when being constant, finish timing and can change emitted dose by changing to spray.Can proofread and correct injection timing (beginning/end), injection cycle, the influence (surge characteristic) that injection interval etc. sprayed with the previous stage shown in the compensation image 6.Equally by this way, engine condition can be similar to dbjective state (that is, can improve the validity of control).

The more detailed example (the more new mode of correction factor at length) of the correction mode that passes through the processing among Figure 10 will be described by reference Fig. 5 and Fig. 6 then.In this example, at first, with respect to the jet model of particular reference value correction data numbering 1, and then, with respect to the jet model of having proofreaied and correct, the jet model of correction data numbering 2.

At first, will describe pattern in detail by reference Fig. 5 about the correction of the jet model of data number 1.As shown in Figure 5, if carry out corresponding to the injection in the jet model of data number 1, shown in solid line L4, produce the fluctuation degree Δ NE of engine speed NE with respect to engine speed NE stable in deceleration work (illustrating) by the dotted line L4a among Fig. 5.Detect and according to the fluctuation degree Δ NE of formula 1 and formula 3 calculation engine rotational speed N E and final the acquisition as being the fluctuation parameter Δ E of energy value.In correction shown in Figure 10 is handled, from EEPROM 66, read fluctuation parameter Δ E (data B) at S42.In addition, for example from ROM 64, also read by the particular reference value (data A) shown in the dotted line L4b of Fig. 5.For example wait the predetermined value of determining (adopted value) can be used as reference value (data A) in advance by experiment.

At S44, as shown in Figure 5, calculate the difference between data A and the data B and be defined as two degree of deviation Δ K1 (Δ K1=A-B) between the data.At S45, based on the correction factor LV of degree of deviation Δ K1 renewal about the jet model of data number 1.At length, for respect to reference value (data A) compensate degree Δ K1, for example, be the injection cycle shown in the dotted line L1a of Fig. 5 from moment t1 to moment t2a from the moment t1 injection cycle correction of t2 extremely constantly.As a result, shown in the dotted line L2a among Fig. 5, can increase Spraying rate characteristic R and final emitted dose.Region R 1a among Fig. 5 shows because the increase of the emitted dose of proofreading and correct.

Then, by reference Fig. 6, with the correction mode of explanation about the jet model of data number 2.As mentioned above, carry out correction with respect to the jet model of proofreading and correct in the data number 1.That is, after the correction of the jet model of data number 1, carry out about the injection in the jet model of data number 2.In this case, at the S42 of Figure 10, from EEPROM 66, read because the fluctuation parameter Δ E (data B) that previous stage shown in Figure 6 is sprayed and the back one-level is sprayed.In addition, here, the data after the correction of the jet model of the data number 1 fluctuation parameter Δ E of correction factor (that is, corresponding to) are used as the data A of calibration reference.Proofread and correct back data (data A) corresponding among Fig. 6 by the fluctuation parameter Δ NE shown in the dotted line L14b (being converted to fluctuation parameter Δ E).

In following S43, the value that is converted to every specific unit discharge time number as the data A and the data B of mean value respectively.Here, two time numbers are used as unit discharge time number.For the data A that sprays about single-stage, data A multiply by 2 to obtain the fluctuation parameter Δ E of per twice injection.As a result, data A becomes corresponding to the value by the fluctuation parameter Δ NE shown in the dotted line L14c among Fig. 6.Data B about the multi-injection that sprays as two-stage keeps as it is.

At S44, as shown in Figure 6, calculate the difference between data A and the data B and be defined as two degree of deviation Δ K2 (Δ K2=A-B) between the data.At S45, based on the correction factor LV of degree of deviation Δ K2 renewal about the jet model of data number 2.At length, for with respect to data (data A) compensate degree Δ K2 about the jet model of data number 1, for example, be the injection cycle shown in the dotted line L11a of Fig. 6 from the moment t14 injection cycle correction of t15 extremely constantly from moment t14 to moment t15a.As a result, shown in the dotted line L2a among Fig. 6, can increase Spraying rate characteristic R and final emitted dose.Region R 12a among Fig. 6 shows because the increase of the emitted dose of proofreading and correct.

As mentioned above, in this example, after the correction of the jet model of data number 1, the fluctuation parameter Δ E of the jet model of the data number 1 after proofreading and correct (data A, B) and the jet model of uncorrected data number 2.Then, based on the data A that has proofreaied and correct (single-stage injection) correction data B (multi-injection).According to this scheme, carry out the relative correction of data B based on the A of correction data that comprises little error with respect to actual value.Therefore, about data B, compensate error equally indirectly with respect to actual value (absolute deviation degree).Similarly, based on can proofread and correct another jet model three grades of injections of multi-injection (for example, as) about the jet model of the data number (for example, data number 2) of proofreading and correct.Therefore, the jet model of proofreading and correct based on adjoining land can be carried out accurate correction continuously.In particular, if with single-stage, two-stage, three grades and more multistage order are carried out and are proofreaied and correct, can be accurately and carry out the correction (correction of spray characteristic) of the multi-injection with a large amount of ejector stages efficiently.

Then, by reference Figure 11 and 12, another pattern (proofreading and correct II) handled of proofreading and correct will be explained.As shown in figure 11, in a series of processing,, determine whether to satisfy above-mentioned executive condition at first at S51.When S51 when being, handle forwarding S52 to.The processing of S41 is similar in the processing of S51 and Figure 10.Here, when except that the jet model of data numbering 1 and data number 2, obtain only at the jet model that is different from data number 2 aspect the injection interval IBL, promptly, multiple jet model to a specific quantity that difference each other only is injection interval IBL (for example, shown in Figure 12 A to 12C 18) time, satisfy executive condition.Obtain these jet models as data number 3,4,5 grades with as the jet model of data number 1 and data number 2 by the processing among Fig. 4 (obtaining processing) to follow data number 1,2 and to be stored among the EEPROM 66.

At S52, the processing of the processing of the S42 to S44 by being similar to Figure 10, read since the fluctuation parameter Δ E of the jet model (corresponding to first injection unit and second injection unit) of data number 1,2 as data A, B.Then, Qian processing as a comparison, conversion treatment is applied on the fluctuation parameter Δ E arbitrarily.Then, calculating and acquisition are about the degree of deviation Δ K of conversion value (conversion value of fluctuation parameter Δ E).At following S53, obtain to be illustrated in the waveform (shape information) that concerns between the injection interval of the degree of deviation Δ K that S52 obtains and second injection unit based on degree of deviation Δ K (when there being degree of deviation Δ K all when a plurality of).At following S54, determine whether obtain target waveform information by processing at S53.

When S54 for not the time, stop a series of processing of Figure 11 immediately.After this,,, obtain degree of deviation Δ K (at S52) and in addition, calculate (at S53) waveform (shape information) continuously once more via the processing of S51 to S53 if still satisfy to proofread and correct executive condition.At S52, combine about the jet model (second injection unit) of the jet model (first injection unit) of data number 1 with data number 2,3,4,5 grades that only differ from one another at injection interval IBL.For example, carry out the combination of data number 1,3, carry out the combination of data number 1,4 and carry out the combination of data number 1,5 in the 4th time in the 3rd time in second time.Then, for each continuously in conjunction with the degree of deviation Δ K that obtains fluctuation parameter Δ E (conversion value).Therefore, for (that is, obtaining target waveform information) till being, repeatedly carry out the processing of S51 to S53 up to definite S54.As S54 (, obtain target waveform information) when being,, calculate phase deviation and periodic deviation with the predetermined reference waveform based on shape information at following S55.

To illustrate about obtaining and calculate the example of the processing (S53 to S55) of waveform (shape information) by reference Figure 12 A to 12C.Figure 12 A to 12C is that each all shows the time diagram about relation between the fluctuation parameter Δ E (longitudinal axis) of second injection unit ( data number 2,3,4,5 etc.) and the injection interval IBL (transverse axis).Transverse axis is represented the border of Δ K=0.The above side in border (Δ K=0) corresponding to overgauge and border (Δ K=0) with next side corresponding to negative deviation.At Figure 12 A to 12C in each, be as specific waveforms (reference waveform) corresponding to the reference of the change pattern of the fluctuation degree of the engine condition of injection interval (because previous stage is sprayed and summation of the fluctuation degree that the back one-level is sprayed) by the waveform shown in the dotted line L30.Reference waveform is stored in the storage device arbitrarily such as ROM 64 or EEPROM 66 in advance.

In this example, shown in Figure 12 A, polytype injection interval IBL of second injection unit of reading at S52 (about data number 2,3, each jet model of 4,5 grades) is set in the specific part in a concentrated manner.In more detail, injection interval IBL only comprises the injection interval corresponding to the part of the regularity that reference waveform (dotted line L30) is shown (positive side roof part P1, minus side top P2 and node section P3).For example, can obtain such data by writing such jet model in the table that in the S32 of Fig. 4, uses in advance.

S53 in a series of processing shown in Figure 11, based on each degree of deviation Δ K, calculate by with the fluctuation parameter Δ E of first injection unit (about the jet model of data number 1) and second injection unit (about data number 2,3,4, each jet model of 5 grades) each fluctuation parameter Δ E compares and the waveform that concerns between the expression degree of deviation Δ K that obtains and the injection interval IBL of second injection unit.At following S54, determine whether to obtain to calculate phase deviation and the required target waveform information (that is the waveform of measurement) of periodic deviation between measured waveform and reference waveform by processing at S53.Waveform (shape information) expression of measuring comprises the injection characteristics of the middle fuel supply system (in particular, sparger 19) of each system (Fig. 1) of aging character variation.At following S55,, calculate phase deviation Δ P and periodic deviation Δ C between measured waveform and reference waveform based on the shape information that obtains at S54.

For example, when obtaining phase deviation Δ P, obtain from the phase deviation Δ P of the measured waveform of reference waveform based on degree of deviation Δ K.That is, detect the positive side summit P1a of measured waveform, the position of P1b (injection interval) is the point of degree of deviation Δ K maximum.Detect measured waveform minus side summit P2a, the position of P2b (injection interval) is the point of degree of deviation Δ K minimum.In addition, detect the node P3a of measured waveform, the position of P3b (injection interval) is zero point for degree of deviation Δ K.Then, positive side summit P1a, P1b, minus side summit P2a, P2b, and node P3a, each position of P3b (each injection interval) compare with the position of each corresponding reference waveform (for example, calculating difference).By relatively, obtain the phase deviation Δ P of measured waveform from reference waveform.In Figure 12 B, illustrated in the relation between measured waveform and the reference waveform (dotted line L30) under the situation that phase deviation takes place between the waveform.

When obtaining periodic deviation Δ C, obtain the periodic deviation Δ C of measured waveform and reference waveform based on degree of deviation Δ K.For example, based on detection node P3a, the position of P3b (that is, injection interval IBL) obtains node P3a, the interval T 33 between the P3b.Similarly, obtain positive side summit P1a, interval T 31 between the P1b and minus side summit P2a, the interval T 32 between the P2b.Each interval T 31, T32, T33 is corresponding to the cycle of measured waveform.Therefore, each interval T 31, T32, T33 (or at interval mean value) compare with the cycle of each corresponding reference waveform (or corresponding average) (for example, calculated difference).By relatively, obtain the cycle position deviation delta C of measured waveform from reference waveform.For example, in Figure 12 C, illustrated in the relation between measured waveform and the reference waveform (dotted line L30) under the situation of the biased difference of generating period between the waveform.

In this proofreaies and correct example, (proofread and correct II), in above-mentioned pattern, calculate and obtain phase deviation Δ P and periodic deviation Δ C between measured waveform and the reference waveform respectively.As shown in figure 11, the S56 behind S55 is updated in the correction factor LV that uses among the S14 of Fig. 2 based on phase deviation Δ P and periodic deviation Δ C.

For example, for compensation of phase deviation delta P and periodic deviation Δ C, renewal is about data number 2,3, each jet model of 4,5 grades (spray, for example by the two-stage as multi-injection, shown in Fig. 6) injection beginning timing t14, spray to finish at least one the correction factor among timing t15 and the injection interval IBL.As a result, can obtain the target engine operating conditions by multi-injection with high precision.

This correction example is an example, and the target of compensation here or correction is not limited to above-mentioned parameter.For example, can upgrade (correction) about above-mentioned nozzle parameter or such as the correction factor of other parameter of injection cycle, with based on the positive dot location of the measured waveform that detects at S55 and at least one the compensated measurement waveform in the negative dot location amplitude error from reference waveform.Therefore, engine condition can be approximated to be target condition (that is, having improved control accuracy).

Therefore, in the present embodiment, obtain processing, get access to the spray characteristic (fluctuation parameter Δ E) of each time that comprises that aging characteristics change by what Fig. 3 and 4 illustrated continuously.In addition, carry out Figure 10 and two types correction shown in Figure 11 handle in (proofread and correct I and proofread and correct II) one of at least.Therefore, upgrade a specific correction coefficient and while, carry out the correction of spraying about fuel by the S13 of use Fig. 2 and the correction factor of S14 based on the value of obtaining (spray characteristic).That is, in the present embodiment, the correction factor that fuel injection controller and the diagnostic method by fuel supply system may obtain each time is as the spray characteristic about each time of fuel supply system.In addition, by using correction factor, may proofread and correct owing to above-mentioned individual difference the departure of aging variation etc. more accurately.

As mentioned above, can obtain following good effect according to the fuel injection controller and the diagnostic method of the fuel supply system of present embodiment, for example.

(1) fuel injection controller (being contained in the ECU 50 that is used for engine control) that is used for controlling the injection work of Fuelinjection nozzle (sparger 19) has following program.One is (spraying actuating device, S32 and S33 among Fig. 4) carries out the multiple jet model of the jet model that comprises multi-injection to specific cylinder in non-injection work injection.(the fluctuation degree obtains device for another, S34 among Fig. 4, S52 among S42 and Figure 11 among Figure 10) be obtain since by said procedure with injection conditions (cylinder number and data number N) carry out about each (for example by one in a plurality of models first injection unit that constitutes, single-stage shown in Fig. 5 is sprayed) and by all of another second injection unit that constitutes in a plurality of models (for example, the multi-injection shown in Fig. 6) spray (under the situation of first injection unit by the one-level jet model once spray and under the situation of second injection unit by twice injection of two-stage jet model) the summation (fluctuation parameter Δ E) of fluctuation degree of engine condition.

Therefore, obtain fluctuation parameter Δ E with injection conditions (first and second injection units) with the same terms except that jet model.Finally, can obtain each spray characteristic.In addition, with each spray characteristic, can be easily and accurately carry out data analysis by data accumulation, the correction of spray characteristic comprises the fault diagnosis etc. of the fuel supply system of sparger 19.

(2) be provided at the identical respectively and mean value that obtains fluctuation parameter Δ E of program that (with reference to S21 among Fig. 3) under the state that sprays executive condition obtain polylith (threshold value SH among Fig. 4) fluctuation parameter Δ E (S35 and S36 among Fig. 4, among Figure 10 among S42 and Figure 11 S52) and jet model (first and second injection units) as final fluctuation parameter Δ E.Therefore, can reduce because the error that the variation of each injection conditions etc. produces, and the result, can be with the better validity parameter Δ E that obtains to fluctuate.

(3) provide a kind of being used for that the fluctuation parameter Δ E about each injection unit that the processing by the S34 of Fig. 4 obtains is converted to the program that is suitable for predetermined comparison condition.At length, the fluctuation parameter Δ E that obtains at S34 is converted to every specific unit discharge time number () value (conversion equipment, S43 among Figure 10 and the S52 among Figure 11) for example, a time.As a result, can automatically obtain the conversion value that is suitable for specific comparison condition (conversion value of fluctuation parameter Δ E) about each injection unit and final, promote the comparison of above-mentioned fluctuation parameter Δ E.

(4) provide a kind of program, the conversion value that this program will be changed in the S52 of the S43 of Figure 10 or Figure 11 is compared to obtain the degree of deviation Δ K (spray deviation and obtain device, at the S44 of Figure 10 and the S52 of Figure 11) between two conversion values.Therefore, another in the injection unit based on the comparison may obtain about one the degree of deviation Δ K of fluctuation parameter Δ E in the injection unit relatively.In addition, may detect each spray characteristic (spray characteristic of multi-injection in particular) based on the degree of deviation Δ K between the conversion value.In addition, in the such scheme, can automatically carry out comparison by comparison program.

(5) provide a kind of program, this program detects the spray characteristic that is limited by sparger 19 based on the degree of deviation Δ K that the S52 of the S44 of Figure 10 or Figure 11 obtains.At length, program obtains the degree of deviation Δ K of expression spray characteristic and correction factor (spray characteristic device, the S56 among S44 among Figure 10 and S45 and Figure 11).As a result, carry out the acquisition of each spray characteristic and final automatically, easily obtain each spray characteristic.

(6) provide a kind of program, the degree of deviation Δ K that this program obtains based on the S52 of the S44 of Figure 10 or Figure 11 is used to proofread and correct the injection (spray characteristic correcting device, S45 among Figure 10, S56 among Figure 11, in addition, S13 and S14 etc. among Fig. 2) of sparger 19.As a result, automatically carry out the correction of spraying and final, can obtain the target engine operating conditions more accurately by multi-injection based on the fuel of each injection.

(7) show and be used for proofreading and correct about (particularly at the timing of the S45 of Figure 10 or the S56 among Figure 11, when upgrading correction factor) emitted dose of the injection carried out with sparger 19 is (for example, the injection beginning timing spray to finish timing and injection cycle) the example of program of parameter.Because the total emitted dose with all injections is relevant basically for fluctuation parameter Δ E, this scheme can compensate with respect to the departure of target engine operating conditions the approximative value of the real engine operating conditions of desired value (that is, to).

(8), can easily proofread and correct (change) injection cycle by the energising cycle that changes sparger 19 especially when injection cycle during as the parameter of emitted dose.

(9) show the timing (particularly, when the renewal of correction factor) that is used for the S45 that proofreaies and correct at Figure 10 or the S56 among Figure 11 example about the program of the injection interval of the jet model of multi-injection.According to this scheme, can compensate the influence (surge characteristic) of spraying and final by previous stage shown in Figure 6, can accurately compensate departure (that is, the real engine operating conditions can be similar to desired value) with respect to the target engine operating conditions.

(10) provide and to keep correction factor with the EEPROM 66 (correction factor holding device) of storage at non volatile state about the correction factor of correction.Have this structure, for example, after motor 10 stopped the power supply (ECU 50) of (for example, turning off ignition switch) and shut-off means, data (value of obtaining of correction factor) remained on non volatile state.As a result, in next this engine start constantly, can carry out correction based on engine start last time data constantly.

(11) executive condition of the injection of S32 among Fig. 4 and S33 (S21 at Fig. 3 determines) adopts the needs that satisfy executive condition, full terms be jet pressure in prespecified range, the rotating speed of motor 10 is in prespecified range and motor 10 slow down (S21 among Fig. 3).As a result, can balanced each injection conditions about above-mentioned condition.

(12) in particular, under the situation that adopts motor 10 to slow down, may under motor 10 is stably state, carry out and spray and final, can detect the parameter Δ E etc. that fluctuates with high sensitivity as the executive condition that sprays.

(13) S34 in Fig. 4, be a particular spray model (for example, single-stage shown in Fig. 5 is sprayed) first injection unit and each in second injection unit of the jet model of the jet model by injection being increased to first injection unit (for example, shown in Figure 6 multi-injection) and definition obtain fluctuation parameter Δ E.In addition, the S52 fluctuation parameter Δ E and therefore of first and second injection units relatively among S44 or Figure 11 obtains the degree of deviation Δ K between them in Figure 10.Therefore, the different piece in the jet model becomes clearly to promote their comparison between first and second injection units.In addition, by relatively, may obtain more accurately about spray characteristic as the injection of different piece (for example, the back one-level in multi-injection shown in Figure 6 is sprayed).

(14) S34 in Fig. 4, be a particular spray model (for example, single-stage shown in Fig. 5 is sprayed) first injection unit and only be the combination of in a plurality of second injection units of jet model of concrete parameter (injection progression) each (for example, shown in Figure 6 multi-injection) and the parameter Δ E that obtains to fluctuate with the difference of the jet model of first injection unit.Such scheme makes the difference (injection progression) of the concrete parameter of basis can accurately obtain spray characteristic.

(15) be included near the injection timing of TDC (upper dead center) carry out as second or the back one-level (for example spray, the multi-injection model (for example, the multi-injection shown in Fig. 6) of the injection back one-level injection of multi-injection shown in Figure 6) is comprised in the multiple jet model of setting in the table that S32 uses in Fig. 4 (corresponding to one in first and second injection units).According to such multi-injection, can obtain for the spray characteristic very important second of detection multi-injection or the fluctuation parameter Δ E of back one-level injection with high sensitivity.In addition since second or the back one-level spray and to be defined as afterbody and to spray, can obtain the spray characteristic of multi-injection more accurately.

(16) wherein very short at least one jet model (for example jet model shown in Fig. 5 or 6) of the injection cycle of all injections is included as first or second injection unit (corresponding in first and second injection units) in the multiple jet model of setting in the table that uses in the S32 of Fig. 4.Be little value by the injection cycle (emitted dose) that limits all each in spraying, parameter (summation of fluctuation degree) can obtain to fluctuate when the restriction driven nature worsens.

(17) jet model of the jet model that is used for controlling corresponding to (equal or be similar to) in the proper functioning of motor 10 (control arteries and veins spectrogram) (for example, comprising the jet model that two-stage or more multistage pair are sprayed) is comprised in the table that uses among the S32 of Fig. 4.As a result, by the correction of spray characteristic etc., in the proper functioning of motor 10, may improve the controllability of spraying control.

(18) in a burning cycle (for example, the cycle of 720 ° of CA) at least one jet model (for example, the jet model shown in Fig. 5 or 6) of carrying out all injections in model is included as first or second injection unit in the multiple jet model of setting in the table that uses in the S32 of Fig. 4.Especially, each during the present embodiment supposition is shown in a burning cycle in all models is carried out all injections.By carrying out above-mentioned correction, can carry out engine control with high precision about such jet model.

(19) S32 in Fig. 4 and S33, at least carry out by single-stage and (for example spray, with reference to Fig. 5) injection of first jet model that constitutes and after this, execution (for example has progression by what be different from first jet model, the injection of second jet model that multi-injection two-stage) (for example, with reference to Fig. 6) constitutes.At the S34 of Fig. 4, be each the parameter Δ E that obtains to fluctuate in first and second injection units.Use this scheme, each in first and second injection units is limited in a jet model.Therefore, can obtain conversion value by simple control about the per unit jet number purpose of each injection unit fluctuation parameter Δ E.

(20) especially, by first and second jet models being set at the single-stage jet model and as the combination of the two-stage jet model of multi-injection model, can be more easily and accurately obtain the spray characteristic of above-mentioned multi-injection.

(21) show to have obtaining fluctuation parameter Δ E (S42 of Figure 10 and the S52 of Figure 11) and carry out the program (obtaining correcting device in advance) of proofreading and correct before about the injection of in first and second injection units (for example, shown in Figure 5 single-stage spray).Use this scheme, can obtain another from the injection unit of proofreading and correct and not proofread and correct the relative deviation degree of injection unit and therefore, also can obtain the absolute deviation degree indirectly.

(22) in above-mentioned example, the program that was used to carry out correction before obtaining fluctuation parameter Δ E is known as with respect to a particular reference value (for example, adopted value) carries out the program (with reference to correcting device) of spraying correction in advance.Therefore, can proofread and correct absolute fluctuation degree at an easy rate.

(23) constitute with respect to one in the injection unit of reference value correction jet model that sprays by single-stage.By this way, the spray characteristic of the correction of spraying based on single-stage can be carried out the correction of injection characteristics of multi-injection or similar processing etc.

(24) show and have by using the injection unit proofreaied and correct with respect to the degree of deviation Δ K reference value as a reference that obtains based on S44 (for example at Figure 10, single-stage shown in Figure 5 is sprayed), be used to carry out about (for example, shown in Figure 6 multi-injection) of not proofreading and correct injection unit and spray the program (relative correction device) of proofreading and correct.In this scheme, automatically be applied on another uncorrected injection unit, make and proofread and correct indirectly about another absolute deviation degree of not proofreading and correct injection unit possibility that becomes based on the correction of the injection unit of proofreading and correct.

(25) also show the example that has based on further carry out the program (continuous correction device) of proofreading and correct by the jet model (injection unit) of said procedure (relative correction device) correction about the injection of another jet model (injection unit).By this way, the jet model of correction is continuously as a reference to carry out accurate the correction continuously.

(26) by with the first order, the second level, the order of the third level and more level is carried out and is proofreaied and correct, can be more accurately and carry out the multistage correction of a large number of ejector stage efficiently.

(27), carry out each other at least injection at injection interval two kinds of multi-injection models inequality with a definite sequence at S32 and the S33 of Fig. 4.At the S34 of Fig. 4, for obtaining fluctuation parameter Δ E corresponding to each first and second injection unit at two kinds of different models of injection interval each other.Use this scheme, can be relatively easily and accurately obtain spray characteristic about the multi-injection of injection interval.

(28) S52 in Figure 11, by a particular spray model (for example, single-stage shown in Figure 5 is sprayed) injection unit (first injection unit) that constitutes and the multiple multi-injection model (data number 2 that only is the size of injection interval by difference each other, 3, the jet model of 4,5 grades) each in a plurality of injection units of Gou Chenging (second injection unit) combines.For each in conjunction with obtaining fluctuation parameter Δ E.By this way, can obtain the spray characteristic of each value of injection interval with highi degree of accuracy based on an injection unit (first injection unit).

(29) also provide a kind of storage device, this memory device stores is about the specific waveforms (each in Figure 12 A to 12C is by the reference waveform shown in the dotted line L30) corresponding to the change pattern of the summation of the fluctuation degree of the engine condition of injection interval.At least one injection interval corresponding to the part of the regularity that reference waveform (dotted line L30) is shown is included in the multiple injection interval of second injection unit.By this way, the correctly cycle of detection waveform and phase place, and finally can accurately carry out the correction of spraying about fuel.

(30) in addition, when detection waveform, just the injection interval of second injection unit changes to obtain the fluctuation parameter Δ E of second injection unit continuously continuously with respect to as a reference first injection unit.Make it possible to accurately detection waveform like this.

(31) in addition, in this case, the injection interval of second injection unit is arranged near the part that regularity (the positive side roof part P1 of Figure 12 A to 12C, minus side top P2, and node section P3) is shown in a concentrated manner.Make it possible to detect more accurately the part that regularity is shown like this.

(32), use the top (positive side roof part P1 and minus side top P2) and the node section (node section P3) of reference waveform (the dotted line L30 among Figure 12 A to 12C) as regular part is shown.Make it possible to more easily detect the part that regularity is shown like this.

(33) provide a kind of program (node detection device, S55 in Figure 11) is used to detect the injection interval (data 2 that second injection unit is shown, 3,4, the injection interval of 5 grades) with because the node P3a of the waveform that concerns between the fluctuation parameter Δ E of the jet model of second injection unit, the position of P3b (Figure 12 A to 12C) is as the point based on the irrelevance vanishing of fluctuation parameter Δ E between two values of the fluctuation parameter Δ E of each injection unit that the S52 of Figure 11 obtains.Make it possible to accurately detect the part (node section P3) of the regularity that above-mentioned waveform is shown like this.

(34) provide a kind of program (node detection device, S55 in Figure 11), be used for detecting second injection unit (data number 2 is shown, 3,4, the jet model of 5 grades) injection interval and because the position on the summit of the waveform that concerns between the fluctuation parameter Δ E of the jet model of second injection unit (positive side summit P1a, P1b and minus side summit P2a, P2b), or the point of minimum (in the maximum value of minus side) maximum as the degree of deviation between two values of the fluctuation parameter Δ E of each injection unit that obtains about S52 based on fluctuation parameter Δ E at Figure 11.Make it possible to accurately detect the part (positive side summit P1 and minus side summit P2) of the regularity that above-mentioned waveform is shown like this.

(35) provide a kind of program (node obtains device at interval, S55 among Figure 11), this program is determined interval T 33 between the node based on the position of the node that is detected by said procedure (node detection device).A kind of program is provided, and (periodic deviation obtains device, the S55 of Figure 11), this program is determined by the part P1 P2 among Figure 12 A to 12C, the periodic deviation between reference waveform shown in the data of P3 (L30 of Figure 12 A to 12C) and the measured waveform (injection interval and because the waveform that concerns between the fluctuation parameter Δ E of the jet model of second injection unit of second injection unit are shown).Therefore, can obtain the periodic deviation of measured waveform from reference waveform.

(36) provide a kind of program (vertex spacings obtain device, the S55 among Figure 11), based on the position by the detected summit of foregoing description program (summit detection device), this program is used to obtain the interval T 31 between the summit, T32.A kind of program (periodic deviation obtains device, S55 among Figure 11) that is used to obtain the periodic deviation between reference waveform and the measured waveform is provided.By this way, can obtain the periodic deviation of measured waveform from reference waveform.

(37) (phase deviation obtains device to provide a kind of program, S55 among Figure 11), this program is used for based on the fluctuation parameter Δ E about the injection unit that obtains at Figure 11 S52 place, more specifically, obtain the phase deviation between reference waveform and the measured waveform based on position based on fluctuation parameter detected node of Δ E or summit.As a result, can obtain the phase deviation of measured waveform from reference waveform.

(38) show the have a kind of program example of (injection interval correcting device), the phase deviation of the measured waveform that obtains based on S55 place (about the phase deviation of the jet model of second injection unit) at Figure 11, this program is used to proofread and correct injection interval.Make it possible to so easily and carry out the correction of phase deviation automatically.

(39) example (injection beginning timing correcting device) with a kind of program is shown, based on the phase deviation of the measured waveform that obtains at the S55 of Figure 11, this program is used to proofread and correct the injection beginning timing.Make it possible to carry out the correction of the mobile delay of Fuelinjection nozzle (sparger 19) like this, and final, can carry out owing to move the correction of the phase deviation that postpones.

(40) show and have a kind of program the example of (spray and finish the timing correcting device), the phase deviation of the measured waveform that obtains based on the S55 at Figure 11, this program are used for proofreading and correct spraying and finish timing.Make it possible to carry out the correction of the mobile delay of Fuelinjection nozzle (sparger 19) like this, and final, carry out owing to move the correction of the phase deviation that postpones.

(41) provide a kind of program (speed detector, the S34 of Fig. 4) that is used for the rotating speed of detection of engine 10.At the S34 of Fig. 4, should obtain fluctuation parameter Δ E based on the engine speed that detects.Make it possible to easily and accurately obtain fluctuation parameter Δ E like this.

(42) at the S34 of Fig. 4,, obtain fluctuation parameter Δ E as energy value by detected engine speed is converted to energy equivalent.Make it possible to like this suppress because the change detected that the difference of engine speed causes.

(43) at the S34 of Fig. 4, based on as the rotating speed of the bent axle 15 of the output shaft of motor 10 be used for driving (at 720 ° of CA in the cycle) one of at least continuously detection of engine rotational speed N E of rotating speed of valve operation of cam axle 16 of the suction valve 161 (or outlet valve) of motor 10.According to this scheme, only be used for the parts of overall control, more easily the detection of engine rotating speed.

(44) (rotating speed detects and determines device constantly to provide a kind of program, S34 among Fig. 4), based on the rotating speed of the rotating speed that moves the valve operation of cam axle 16 that rotates synchronously of the suction valve 161 (or outlet valve) of motor 10 or the bent axle 15 that is connected with valve operation of cam axle 16, this program is used to determine whether to arrive the detection moment (corresponding to the integral multiple of operation cycle of the suction valve 161 (or outlet valve) of motor 10) of engine speed.Show the example of determining detection detection of engine rotating speed during the moment of arrival engine speed when program.This scheme makes it possible to the accurately rotating speed of detection of engine 10.

(45) at the S34 of Fig. 4, the rotating speed of detection of engine 10 continuously in corresponding to the cycle (720 ° of CA cycles) of burning cycle is wherein carried out burning in all cylinders of motor 10.Make it possible to like this suppress because the friction in the cylinder changes the detection error that produces.

(46) in addition, because cycle 720 ° of CA are the cycles corresponding to the integral multiple cycle (integral multiple of the suction valve of motor 10 or the operation cycle of outlet valve) of the rotation period of bent axle 15 or camshaft 16, can reduce equally because the detection error that the variation (difference) in the interval of the pulse production part (toothed portion 15b, toothed portion 16b etc.) of rotor 15a of each or rotor 16a produces.

(47) owing to obtain fluctuation parameter Δ E, can directly survey fluctuation parameter Δ E based on engine speed, and without the arteries and veins spectrogram of adopting by reference etc.Therefore, can obtain the fluctuation parameter Δ E that each reflection aging characteristics change with high precision.

(48) at the S32 to S34 of Fig. 4, the multicylinder engine with the sparger 19 that is arranged in each cylinder is as control target, for each cylinder is carried out injection and obtained fluctuation parameter Δ E.By this way, can compensate because the error of the fuel supply of individual difference for each cylinder (each sparger) acquisition spray characteristic and based on spray characteristic.Finally, may realize to obtain the multicylinder engine of required engine condition accurately.

(49) based on the correction factor of degree of deviation Δ K that obtains by said method or the reflection degree of deviation Δ K attenuation parameter of the decreased performance degree of the fuel supply system that motor 10 is shown (all corresponding to), can judge whether the fuel supply system of motor 10 normally works.

For example, present embodiment can carry out following modification.

Based on the degree of deviation Δ K or the correction factor that obtain by said method, can be more definitely or in fact can automatically carry out the diagnosis whether fuel supply system of motor 10 normally works.For example, can carry out failure safe processing etc. based on amplitude or the correction factor of degree of deviation Δ K.For example, under the situation of correction factor,, carry out correction based on correction factor as in these cases less than predetermined value.Under the situation of correction factor, can carry out such as any warning of opening emergency warning lamp and handle to impel the user to change sparger 19 etc. greater than predetermined value.For example, degree of deviation Δ K or correction efficient usually (or at any time) are presented in the visible location in the vehicle, thereby the user can confirm the decreased performance degree of each fuel supply system.In this scheme, may be early and suitably detect spray characteristic (in particular, the spray characteristic of multi-injection), proofread and correct spray characteristic and change sparger 19 etc.

In the present embodiment, on the level before the comparison, obtain a plurality of fluctuation parameter Δ E and acquisition final fluctuation parameter Δ E as mean value.Replacedly, for example, by repeatedly relatively obtaining a plurality of degree of deviation Δ K and can obtaining final degree of deviation Δ K as mean value.Equally in this case, can obtain to be similar to or corresponding to the effect of effect (2).

In the scheme that is used for calculating these mean values, calculate behind the mean value only with remaining mean value and can delete other data that are used for calculating mean value.Under the storage capacity condition of limited of the storage device that uses, such scheme is useful equally.

At the timing (particularly, when the renewal of correction factor) of the S56 of the S45 of Figure 10 or Figure 11, can proofread and correct Spraying rate (fuel quantity that time per unit sprays) as the parameter of emitted dose.Can change Spraying rate by using by on-line operation sparger (for example, on-line operation piezoelectric injector) in the hydraulic pressure cavity transmission of drive force of Electromagnetic Drive sparger 19 positions.Equally in this case, can obtain to be similar to or corresponding to the effect of effect (7).

Present embodiment supposition is used for waiting by test the arteries and veins spectrogram (Fig. 2 S11) of the employing that limits adopted value in advance, and will be used for being stored in by the correction factor that the arteries and veins spectrogram that adopts is proofreaied and correct spray characteristic can be with the EEPROM 66 of non-volatile state maintenance correction factor.Replacedly, for example, the value after the correction can be stored in the position that is used for correction factor among the EEPROM 66.As the example of such scheme, can adopt so-called non-employing scheme, it does not need the arteries and veins spectrogram that adopts, as long as the value after proofreading and correct is reliable fully.If the value after correction factor or the correction can remain on non-volatile state, can adopt storage device on demand in the position of EEPROM such as another nonvolatile storage or backup RAM.Equally in this case, can obtain to be similar to or corresponding to the effect of effect (10).

Present embodiment can constitute the condition about speed changer of the executive condition (S21 at Fig. 3 determines) that comprises as the injection of S32 in Fig. 4 and S33.In same this scheme, can obtain to be similar to or corresponding to the effect of effect (11).In this case, even when (in particular in the working procedure of the vehicle that comprises controller, at run duration) under the situation of carry out spraying, under the condition that clutch breaks away from MT21 (manually-operable speed changer), spray, can suppress from the interference of road surface via the follower effect by carrying out.Under based on situation by the spray characteristic that sprays the fluctuation parameter detecting sparger that obtains, reduced error from the interference generation on road surface, can carry out more accurate detection.For example, under with the situation of controller action of the present invention to AT (automatic transmission) vehicle, provide a kind of structure effectively, i.e. the locking of the torque-converters in aT (T/C) is in to carry out under the condition of state of disengaging and sprays.Equally in this case, can obtain to be similar to the effect of MT situation.Can be increased on the above-mentioned condition or use in the place of the condition that can slow down etc. at motor 10 about such condition of speed changer.If carry out injection as the condition about speed changer of primary condition, can obtain very high detection validity but become to be difficult to guarantee to spray the enough frequencies of execution by limiting.Therefore, depending on that it uses, will be favourable in conjunction with (that is, as or condition) about the condition of speed changer and above-mentioned other condition abreast.For example, the condition in disengaged position in MT also is same favourable as one of necessary condition that satisfies the injection executive condition in deceleration or clutch to use motor 10.

Other condition also can be included in the executive condition of injection.For example, for the influence of limiting friction etc., the temperature that comprises motor 10 is effective as condition.On the other hand, may allow from the executive condition that sprays, to remove unnecessary condition on demand.About this condition, one of satisfy condition in the condition conduct of the processing of non-injection work as long as comprise motor at least, condition can adopt arbitrarily.

Present embodiment supposition is the S32 of Fig. 4 and the executive condition (definite among the S21 of Fig. 3) of the injection among the S33 fixedly.Replacedly, can adopt the program (spraying the executive condition changeable device) of setting the executive condition that sprays changeably.In this case, because executive condition changes, executive condition can be applied in each application with changing more neatly.The variation by carrying out executive condition changeably and the detection of spray characteristic can easily detect the spray characteristic corresponding to the difference of executive condition (jet pressure, engine speed etc.).In this case, a kind of structure is provided effectively, this structure is stored fluctuation parameter Δ E relatively with executive condition and number of cylinders and jet model (data number N) in storage device arbitrarily, promptly, a kind of scheme is provided, this scheme in the future when from memory point (storage device), reading each data in each data of distinguishable state condition managing.

The multi-injection that present embodiment adopts single-stage shown in Figure 5 to spray to spray as first injection unit and two-stage shown in Figure 6 is compared as second injection unit and the fluctuation parameter Δ E that will be caused by all injections of each unit respectively.First and second injection units are not limited to such jet model, but can be arbitrarily, as long as the jet model of multi-injection is included in in first and second injection units at least one.That is, in first and second injection units or both can be made of a particular combination/a plurality of combinations of jet model.

For example, S32 in Fig. 4 and S33, can carry out with a particular order and spray by single-stage at least or first jet model of the n level of the specific progression that multi-injection constitutes, spray or second jet model of the m level of the specific progression that multi-injection constitutes and the 3rd jet model that constitutes by the n+m level of multi-injection by single-stage.At following S34, each the parameter Δ E that can obtain to fluctuate in first injection unit that constitutes for structure and second injection unit that constitutes by the 3rd jet model by first and second jet models.For example, about a jet model (single-stage injection), three jet models (three grades of multi-injections) and four jet models (level Four multi-injection), the combination of a jet model and three jet models is set at first injection unit and four jet models are set to second injection unit.About each jet model, obtain fluctuation degree Δ E11 (transformation of energy value) (jet model), fluctuation degree Δ E13 (three jet models) and the fluctuation degree Δ E24 (four jet models) of engine condition.The fluctuation parameter Δ E1 that obtains first injection unit is that Δ E11+ Δ E13 and the fluctuation parameter Δ E2 that obtains second injection unit are Δ E24.By this way, by using combination as a particular spray model of one of first injection unit and second injection unit, may constitute a pair of first and second injection units (that is, the summation of the discharge time number of first injection unit is identical with the summation of the discharge time number of second injection unit) of the summation of progression with all equal jet models.In addition, according to this scheme, under the situation of the conversion of fluctuation parameter Δ E (Δ E1 in above example and Δ E2) (that is, the conversion of discharge time number), possible accuracy ground is carried out relatively before not carrying out relatively.

In addition, present embodiment can constitute like this, promptly (for example in the parameter except that the discharge time number, injection interval IBL shown in Fig. 6, injection beginning timing t14, spray finishing timing t15, injection cycle T12, Spraying rate R (solid line L12) etc.) two kinds of jet models differing from one another are set at first and second injection units respectively.Fluctuation parameter Δ E or degree of deviation Δ K can be obtained, and further, the detection or the correction of spray characteristic about parameter etc. can be carried out about parameter.In such structure, also may be relatively easily and accurately obtain the spray characteristic of multi-injection.

A kind of scheme also is effectively same, the multiple jet model of setting at the table place that the S32 of Fig. 4 uses in this scheme (corresponding to one in first and second injection units) comprises the multi-injection model, this multi-injection comprises that second or back with the injection cycle that is equal to the invalid injection cycle cycle of the border between non-injection and the injection beginning (in the normal cycle as) spray (for example, the back one-level of multi-injection shown in Figure 6 is sprayed).For example, under the situation of the invalid injection cycle of reality than the weak point of normal cycle, and in conventional environment, should be zero emitted dose and switch to positive side, promptly, for the injection under the conventional environment is not that the injection cycle of correct injection cycle is carried out down under the situation of spraying, and obtains the degree of deviation or the emitted dose of injection period based on above-mentioned fluctuation parameter Δ E or degree of deviation Δ K.In this scheme, fuel quantity control very low with the deterioration of restriction driven nature and simultaneously, can accurately detect the degree of deviation at least about a direction (the positive side of emitted dose) of the spray characteristic of injection cycle (final, emitted dose).Yet, switching in emitted dose under the situation of minus side, the fluctuation of engine speed does not take place and the very difficult deviation that detects.Therefore, this scheme is unsuitable for being applied to the degree of deviation of detection about the both direction of the spray characteristic of injection cycle (final, emitted dose).

Present embodiment adopts positive side roof part P1, and minus side top P2 and node section P3 be as illustrating the part of the regularity of reference waveform (the dotted line L30 among Figure 12 A to 12C), also is enough but only adopt in them at least one.For example, can just adopt node section just adopt positive side or minus side part to obtain shape information effectively with very little number of times detection time as target.Regular part is shown is not limited to these parts, but, for example, can adopt the point (for example, intermediate point) between positive side roof part P1 and the node section P3.In order to increase accuracy in detection etc., when obtaining the waveform (shape information) of the spray characteristic shown in Figure 12 A to 12C, can be included in except the injection interval that regular part is shown in the interval of second injection unit that the S52 of Figure 11 reads.

Present embodiment can constitute like this, (for example promptly provide band-pass filter, the band-pass filter that constitutes by known transfer function), for example, for the sensor output of speed probe (crank angle sensor 41 or cam-angle sensor 42), this band-pass filter has the passband corresponding to the detection time of engine speed (S34 in Fig. 4).Therefore, by band-pass filter one particular moment detection of engine rotating speed.In this structure, can remove unnecessary noise and detect validity to improve.

Thereby present embodiment formation like this passes through the rotating speed of the speed probe of electromagnetism grab type in a specific corner detection of engine.Replacedly, for example, can use the linearity test type speed probe of the pivotal position that is used for linearly (that is, continuously) detection bent axle.For example, resolver is known as linearity test type speed probe.

In the present embodiment, when obtaining fluctuation parameter Δ E, the each detection because the summation of the fluctuation degree in the engine condition of all injections of first and second injection units in each.Replacedly, fluctuation degree in the engine condition of (for example, the previous stage of multi-injection shown in Figure 6 is sprayed and back one-level each in spraying) can be obtained because each the injection individually and summation can be obtained mutually the fluctuation degree of each injection unit owing to all injections.Equally in this case, can obtain fluctuation parameter corresponding to each injection unit.As long as can obtain because the summation of the fluctuation degree of the engine condition of all injections as the fluctuation parameter, can adopt the method (structure) that at random changes said method (structure) according to using.

Present embodiment can use except that the discharge time number parameter as a comparison condition and can the comprising fluctuation parameter Δ E (comparing data) that is used for each injection unit that the processing by the S34 of Fig. 4 is obtained be converted to the program that is suitable for comparison condition.For example, can be before comparison on duty with relatively one with a specific magnification ratio to eliminate the influence except that the parameter of target as a comparison.Like this can more accurate comparison.For example, under situation, eliminate influence effectively such as other parameter in the time lag (being applied to increase/reduction of fluctuation parameter Δ E) about the comparison of injection cycle.

The conversion of fluctuation parameter Δ E is not an indispensable element before relatively.In the application that does not need to change, can change.For example, exist under the situation that does not have automatic conversion treatment or comparison process the situation that fluctuation parameter Δ E before obtaining relatively and user carry out conversion.In addition, there is result, the mutually the same situation of comparison condition of fluctuation parameter Δ E when obtaining as the combination of first and second injection units.Under these circumstances, can save conversion.

Present embodiment can constitute like this, thereby the fluctuation parameter Δ E before the S34 of Fig. 4 obtains relatively and not automatically (for example, program) carrying out about the comparison of degree of deviation Δ K and obtain the situation of processing (processing of S44 among Figure 10 or the S52 of Figure 11) under the user carry out comparison.In this case, can save processing about Figure 10 or correction shown in Figure 11.Promptly use this scheme, can obtain to be similar to the effect of effect (1).

It is not must condition that the fluctuation degree of engine condition (for example, engine speed) is converted to energy equivalent (fluctuation parameter Δ E).Can obtain to detect fully under the situation of validity according to using etc., when needing, can remove these conversion treatment (conversion of being undertaken by formula 3).

As engine condition, for example except that above-mentioned engine speed, can use by in-cylinder pressure sensor detected combustion regime such as engine knock (relevant) with engine torque about fluctuation parameter Δ E.Replace the direct engine operating conditions, can use the equal parts of the engine condition that engine condition is shown indirectly, such as (for example by suitable sensor, the NOx sensor) etc. detected some concrete discharging compositions (for example, NOx) or have a behavior (for example, car speed) of the vehicle of this motor.Under situation about present embodiment being applied on the present automotive control system, be provided for by the program (inner pressure of air cylinder detection device) of the pressure in the in-cylinder pressure sensor detection cylinder and based on torque detects, obtaining very high precision and especially effective in the scheme that the S34 of Fig. 4 obtains fluctuation parameter Δ E by the pressure in the detected cylinder of program.In order to obtain engine condition, can unite and use above-mentioned a plurality of parameters with highi degree of accuracy.

Present embodiment is applied to the common rail system of diesel engine as an example with reference to the present invention, but the present invention can be applied in same substantially mode on the plug ignition type petrol engine (direct injection ic engine in particular).

In the foregoing description and the modification, suppose and use various types of softwares (program).Replacedly, can realize similar function by hardware such as special circuit.

Although most realistic the present invention has been described with preferred embodiment in conjunction with thinking, but be to be understood that the present invention is not limited to disclosed embodiment, but on the contrary, the present invention is intended to cover various modifications and the equivalents in the spirit and scope that are included in appended claim.

Claims (61)

1. one kind is used for controlling and sprays and supply with the fuel injection controller that is used in the injection work of the sparger of motor burnt fuel, and described fuel injection controller comprises:

Carry out the injection actuating device of the injection of a plurality of jet models, described a plurality of jet models comprise at least at least at specific cylinder to be carried out under the state of non-injection work with the jet model of particular order to the multi-injection of this specific cylinder of motor; And

The fluctuation degree obtains device, described fluctuation degree obtains the device acquisition because summation or its equivalents of the fluctuation degree of the engine condition of all injections in each of at least the first injection unit and second injection unit, first injection unit comprises or combination of a plurality of models, and second injection unit comprises by different one or combination in a plurality of models of injection conditions.

2. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains the mean value of device in the summation of the fluctuation degree of the summation of summation of spraying a plurality of fluctuation degree of acquisition under the state that executive condition is identical and first and second injection units are identical and acquisition conduct fluctuation degree.

3. fuel injection controller according to claim 1 is characterized in that, also comprises:

Spray deviation and obtain device, described injection deviation obtains device and will be compared with the degree of deviation between the acquisition summation by the summation that fluctuation degree obtains the fluctuation degree of each injection unit that device obtains.

4. fuel injection controller according to claim 1 is characterized in that, also comprises:

Conversion equipment, described conversion equipment will be converted to the form that is suitable for predetermined comparison condition by the summation that the fluctuation degree obtains the fluctuation degree of each injection unit that device obtains.

5. fuel injection controller according to claim 4 is characterized in that, also comprises:

Spray deviation and obtain device, described injection deviation obtains device and will be compared to obtain the degree of deviation between the conversion value by the conversion value of the injection unit of conversion equipment conversion.

6. fuel injection controller according to claim 3 is characterized in that,

Spraying deviation obtains device and is spraying the comparison of carrying out a plurality of times under the identical state identical with first and second injection units of executive condition to obtain at a plurality of degrees of deviation between the described value and the acquisition mean value as the degree of deviation of the degree of deviation between the described value.

7. fuel injection controller according to claim 3 is characterized in that,

Spray deviation obtain first injection unit that device will comprise the particular spray model with only comprise each other on the size of concrete parameter a plurality of second injection units of different a plurality of jet models each combine with acquisition for the degree of deviation between the described value of each combination.

8. fuel injection controller according to claim 3 is characterized in that, also comprises:

The spray characteristic detection device, described spray characteristic detection device is based on the spray characteristic that is detected sparger by the degree of deviation of spraying the acquisition of deviation acquisition device.

9. fuel injection controller according to claim 3 is characterized in that, also comprises:

The spray characteristic correcting device, described spray characteristic correcting device is based on obtaining the correction of the degree of deviation execution of device acquisition about the injection of sparger by spraying deviation.

10. fuel injection controller according to claim 9 is characterized in that,

The spray characteristic correction about the parameter of the emitted dose of the injection of sparger as correction about the injection of sparger.

11. fuel injection controller according to claim 9 is characterized in that,

The spray characteristic correction about the injection interval of multi-injection model as correction about the injection of sparger.

12. fuel injection controller according to claim 9 is characterized in that, also comprises:

The correction factor holding device, described correction factor holding device keeps about the correction factor of the correction of spray characteristic correcting device or the value after proofreading and correct with non-volatile state.

13. fuel injection controller according to claim 1 is characterized in that,

The executive condition that sprays actuating device comprises that the condition of jet pressure in prespecified range is with as one of its necessary condition that will satisfy.

14. fuel injection controller according to claim 1 is characterized in that,

The rotating speed that the executive condition that sprays actuating device comprises motor in prespecified range with as one of its necessary condition that will satisfy.

15. according to the described fuel injection controller of claim 1, it is characterized in that,

The executive condition that sprays actuating device comprises that motor is slowing down with as one of its necessary condition that will satisfy.

16. fuel injection controller according to claim 1 is characterized in that,

The executive condition of injection actuating device comprises the condition about speed changer.

17. fuel injection controller according to claim 16 is characterized in that,

The executive condition that sprays actuating device comprises that the clutch in the manually-operable speed changer is in disengaged position with as one of its necessary condition that will satisfy.

18. fuel injection controller according to claim 16 is characterized in that,

The executive condition that sprays actuating device comprises that the locking of the torque-converters in the automatic transmission is in disengaged position with as one of its necessary condition that will satisfy.

19. fuel injection controller according to claim 1 is characterized in that, also comprises:

Spray the executive condition changeable device, it can set the executive condition that sprays actuating device with changing.

20. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains device first injection unit of particular spray model and in second injection unit each is obtained the summation of fluctuation degree, and this second injection unit comprises by increase from the jet model of first injection unit or is reduced by at least the jet model that provides once is provided.

21. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains device and obtains total about the fluctuation degree of the combination of first injection unit of particular spray model and second injection unit, and described second injection unit comprises that the difference with the jet model of first injection unit only is the jet model of concrete parameter.

22. fuel injection controller according to claim 1 is characterized in that,

Fluctuation degree acquisition device provides at least one in first and second injection units, described first and second injection units comprise the multi-injection model, this multi-injection model comprise as second or the back one-level spray in the injection of carrying out near the injection timing of upper dead center.

23. fuel injection controller according to claim 1 is characterized in that,

Fluctuation degree acquisition device provides at least one in first and second injection units, described first and second injection units comprise the multi-injection model, this multi-injection model comprise as second or the back one-level spray have an injection that is equal to the injection cycle that sprays periods of inactivity.

24. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains device first and second injection units that comprise jet model respectively is provided, and wherein all injections have short injection cycle.

25. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains device and obtains summation about the fluctuation degree of the jet model that is used to control use in the motor normal work period.

26. fuel injection controller according to claim 1 is characterized in that, also comprises:

The pre-correcting device that obtains, one the injection that described pre-acquisition correcting device was carried out in first and second injection units before the fluctuation degree obtains the summation of device acquisition fluctuation degree is proofreaied and correct.

27. fuel injection controller according to claim 1 is characterized in that,

The fluctuation degree obtains device to be provided and is included in the burning cycle first and second injection units of the jet model of all injections in the implementation model.

28. fuel injection controller according to claim 1 is characterized in that,

The injection actuating device is carried out at least with particular order and is comprised that single-stage is sprayed or the injection of the multiple model of multi-injection, and the part that differs from one another of described model is to spray progression, and

The fluctuation degree obtains device and obtains owing to comprise summation or its equivalents of the fluctuation degree of the engine condition of all injections of each in second injection unit of first injection unit that the part that differs from one another is to spray one of multiple jet model of progression or combination and different or the combinations that comprise described model.

29. fuel injection controller according to claim 28 is characterized in that,

Spraying actuating device carries out at least and comprises that single-stage is sprayed or the injection of second jet model that progression is different from the multi-injection of first jet model is sprayed or sprayed to the injection of first jet model of multi-injection and the single-stage that comprises after this; And

The fluctuation degree obtains device and obtains owing to comprise first injection unit of first jet model and comprise summation or its equivalents of fluctuation degree of the engine condition of all injections in second injection unit of second jet model each, and described fuel injection controller also comprises:

Conversion equipment, described conversion equipment will be converted to the value of every specific unit discharge time number by the summation that the fluctuation degree obtains the fluctuation degree of each injection unit that device obtains.

30. fuel injection controller according to claim 29 is characterized in that,

One in first and second jet models comprises that single-stage is sprayed and another comprises multi-injection.

31. fuel injection controller according to claim 30 is characterized in that,

One in first and second jet models comprises that single-stage is sprayed and another comprises the multi-injection of two-stage.

32. fuel injection controller according to claim 28 is characterized in that,

Spray actuating device and carry out first jet model at least, have by single-stage and spray or second jet model of the m level that multi-injection constitutes and the 3rd jet model with the n+m level that constitutes by multi-injection with the n level that constitutes by single-stage injection or multi-injection with particular order; And

The fluctuation degree obtain device obtain since comprise first jet model and second jet model combination first injection unit and comprise summation or its equivalents of fluctuation degree of the engine condition of all injections in second injection unit of the 3rd jet model each.

33. fuel injection controller according to claim 28 is characterized in that, also comprises:

With reference to correcting device, a described injection with respect to particular reference value of carrying out with reference to correcting device in first and second injection units is proofreaied and correct before the summation of fluctuation degree acquisition device acquisition fluctuation degree.

34. fuel injection controller according to claim 33 is characterized in that,

A jet model that comprises that single-stage is sprayed in the injection unit of proofreading and correct with respect to reference value by the reference correcting device.

35. fuel injection controller according to claim 33 is characterized in that, also comprises:

Spray deviation and obtain device, described injection deviation obtains device and will compare to obtain the degree of deviation between the described value owing to the summation of the fluctuation degree of the injection unit that is obtained the device acquisition by fluctuation degree or about the conversion value that the summation by the parameter that will fluctuate is converted to the injection unit that the value at every specific unit discharge time number between first and second injection units obtains; And

The relative correction device, described relative correction device is carried out the injection correction of not proofreading and correct injection unit by using by another injection unit of reference correction, as the reference based on the degree of deviation that is obtained by injection deviation acquisition device.

36. fuel injection controller according to claim 35 is characterized in that, also comprises:

The continuous correction device, described continuous correction device is proofreaied and correct based on the injection of being carried out another injection unit by the injection unit of relative correction device correction.

37. fuel injection controller according to claim 1 is characterized in that,

Spray actuating device and carry out the injection of two kinds of different multi-injection models on injection interval at least each other with particular order; And

The fluctuation degree obtains device and obtains owing to comprise the summation of the fluctuation degree of the engine condition of all injections in each in first and second injection units of two kinds of different jet models or its equivalents on the time lag each other respectively.

38. according to the described fuel injection controller of claim 37, it is characterized in that, also comprise:

Storage device, described memory device stores is according to the specific waveforms of injection interval about the change pattern of the summation of the fluctuation degree of engine condition; And

Spray deviation and obtain device, described injection deviation obtains device and will compare to obtain the degree of deviation between the described value owing to the summation of the fluctuation degree of the injection unit injection unit that is obtained the device acquisition by fluctuation degree or corresponding to the conversion value that the summation by the parameter that will fluctuate is converted to the injection unit that the value at every specific unit discharge time number between first and second injection units obtains; Wherein

Spray deviation obtain single first injection unit that device will comprise the particular spray model with comprise each other on the size of injection interval that each in a plurality of second injection units of different multi-injection models combines and to each in conjunction with the degree of deviation between the described value of acquisition, and

The injection interval of multiple second injection unit comprises an injection interval corresponding to the part that the regularity that is stored in the waveform in the storage device is shown at least.

39. according to the described fuel injection controller of claim 38, it is characterized in that,

Regular part is shown is included in the top of the waveform of storing in the storage device and at least one in the node section.

40. according to the described fuel injection controller of claim 39, it is characterized in that, also comprise:

The node detection device, the position of the node of described node detection device detection waveform, described waveform illustrates the injection interval of second injection unit and because the summation of the fluctuation degree of the engine condition of the jet model of second injection unit or the relation between its equivalents, as based on being zero point about the summation of the fluctuation degree of the acquisition of injection unit, about the degree of deviation between the summation of the fluctuation degree that obtained the injection unit that device obtains by fluctuation degree.

41. according to the described fuel injection controller of claim 40, it is characterized in that, also comprise:

Node obtains device at interval, and described node obtains device at interval and obtains interval between the node based on the position by the detected node of node detection device; And

Periodic deviation obtains device, described periodic deviation obtains device based on obtained the node interval that device obtains at interval by node, and acquisition is stored in the waveform in the storage device and the injection interval and because the periodic deviation between the waveform that concerns between the summation of the fluctuation degree of the engine condition of the jet model of second injection unit or its equivalents of second injection unit are shown.

42. according to the described fuel injection controller of claim 39, it is characterized in that, also comprise:

The summit detection device, described summit detection device detects the position on the summit of this waveform, this waveform is illustrated in the injection interval of second injection unit and because the summation of the fluctuation degree of the engine condition of second injection unit or the relation between its equivalents, as based on being maximum or minimum point about the summation of the fluctuation degree of the acquisition of injection unit, about the degree of deviation between the summation of the fluctuation degree that obtained the injection unit that device obtains by fluctuation degree.

43. according to the described fuel injection controller of claim 42, it is characterized in that, also comprise:

Vertex spacings obtains device, and described vertex spacings obtains device and obtains interval between the summit based on the position by the detected summit of detection device, summit; And

Periodic deviation obtains device, described periodic deviation obtains device based on obtaining the vertex spacings that device obtains by vertex spacings, and acquisition is stored in the waveform in the storage device and is illustrated in the injection interval and because the periodic deviation between the waveform that concerns between the summation of the fluctuation degree of the engine condition of the jet model of second injection unit or its equivalents of second injection unit.

44. according to the described fuel injection controller of claim 37, it is characterized in that, also comprise:

Phase deviation obtains device, described phase deviation obtains device based on the summation about the fluctuation degree that obtained the injection unit that device obtains by fluctuation degree, obtains to be stored in the waveform in the storage device and is illustrated in the injection interval of second injection unit and owing to the phase place phase deviation between the waveform that concerns between the summation of the fluctuation degree of the engine condition of the jet model of second injection unit or its equivalents.

45. according to the described fuel injection controller of claim 44, it is characterized in that, also comprise:

The injection interval correcting device is based on the phase deviation about the jet model that obtained second injection unit that device obtains by phase deviation, described injection interval correction injection interval.

46. according to the described fuel injection controller of claim 44, it is characterized in that, also comprise:

Injection beginning timing correcting device is based on the phase deviation about the jet model that obtained second injection unit that device obtains by phase deviation, the timing of described injection beginning timing correction injection beginning.

47. according to the described fuel injection controller of claim 44, it is characterized in that, also comprise:

Spray to finish correcting device, based on the phase deviation about the jet model that obtained second injection unit that device obtains by phase deviation, described injection finishes the timing correction and sprays and finish timing.

48. fuel injection controller according to claim 1 is characterized in that,

Spray actuating device and carry out the injection of two kinds of different jet models on injection timing at least each other with particular order; And

The fluctuation degree obtains device and obtains owing to comprise the summation of the fluctuation degree of the engine condition of all injections in each in first and second injection units of two kinds of different jet models or its equivalents on injection timing each other respectively.

49. fuel injection controller according to claim 1 is characterized in that,

Spray actuating device and carry out the injection of two kinds of different jet models on injection cycle at least each other with particular order; And

The fluctuation degree obtains device and obtains owing to comprise the summation of the fluctuation degree of the engine condition of all injections in each in first and second injection units of two kinds of different jet models or its equivalents on injection cycle each other respectively.

50. fuel injection controller according to claim 1 is characterized in that,

Spray actuating device and carry out the injection of two kinds of different jet models on Spraying rate at least each other with particular order; And

The fluctuation degree obtains device and obtains owing to comprise the summation of the fluctuation degree of the engine condition of all injections in each in first and second injection units of two kinds of different jet models or its equivalents on Spraying rate each other respectively.

51. fuel injection controller according to claim 1 is characterized in that, also comprises:

Speed detector, the rotating speed of described speed detector detection of engine, wherein:

The fluctuation degree obtains device and obtains because summation or its equivalents of the fluctuation degree of the engine condition of all injections based on the engine speed that is detected by speed detector.

52. according to the described fuel injection controller of claim 51, it is characterized in that,

The fluctuation degree obtain device will by the detected engine speed of speed detector be converted to energy equivalent and obtain thus as energy value because summation or its equivalents of the fluctuation degree of the engine condition of all injections.

53. according to the described fuel injection controller of claim 51, it is characterized in that,

Speed detector is based on the engine speed as the rotating speed detection of engine of the bent axle of the output shaft of motor.

54. according to the described fuel injection controller of claim 51, it is characterized in that,

Speed detector is based on the engine speed of the rotating speed detection of engine of the valve operation of cam axle of suction valve that is used to drive motor or outlet valve.

55. according to the described fuel injection controller of claim 51, it is characterized in that,

Speed detector detection of engine rotating speed continuously in corresponding to the cycle of the burning cycle of wherein carrying out the burning in all cylinders of motor.

56. according to the described fuel injection controller of claim 51, it is characterized in that,

Speed detector is at the specific integral multiple of the operation cycle of the suction valve of motor or outlet valve detection of engine rotating speed continuously in the cycle.

57. according to the described fuel injection controller of claim 51, it is characterized in that, also comprise:

Has band-pass filter, wherein corresponding to the detection passband constantly of the engine speed that detects by speed detector;

Speed detector is in the engine speed that detects corresponding to the moment of passband by the motor of band-pass filter.

58. according to the described fuel injection controller of claim 51, it is characterized in that, also comprise:

Rotating speed detects determines device constantly, described rotating speed detects determines constantly whether device arrives detection moment by the engine speed of speed detector based on the angle of rotation decision of valve operation of cam axle that rotates synchronously with the suction valve or the outlet valve work of motor or the bent axle that is connected with valve operation of cam axle valve, wherein:

When the rotating speed detection is determined the definite detection that arrives engine speed of device during the moment, speed detector detection of engine rotating speed constantly.

59. fuel injection controller according to claim 1 is characterized in that, also comprises:

The inner pressure of air cylinder detection device, described inner pressure of air cylinder detection device detects the pressure in the cylinder, wherein:

The fluctuation degree obtains device and obtains because summation or its equivalents of the fluctuation degree of the engine condition of all injections based on the pressure in the cylinder that is detected by the inner pressure of air cylinder detection device.

60., it is characterized in that according to each described fuel injection controller among the claim 1-59:

Motor is the multicylinder engine with a plurality of cylinders;

Sparger is arranged in each of a plurality of cylinders; And

Spray actuating device and fluctuation degree acquisition device and carry out the obtaining of summation of the injection of each cylinder and fluctuation degree respectively.

61. the diagnostic method of the fuel supply system of a motor, the drawdown parameter that described diagnostic method is used for obtaining illustrating the decreased performance degree of fuel supply system comprises with the diagnosis motor whether the fuel supply system of the sparger that sprays the fueling that is used to burn normally works, and described diagnostic method comprises:

At least carry out under the state of non-injection work to carry out with a plurality of jet models at the specific cylinder of motor and spray, described a plurality of jet models comprise the jet model with the multi-injection of particular order in this specific cylinder of motor at least;

Obtain and relatively owing to comprise summation or its equivalents of fluctuation degree of the engine condition of all injections in second injection unit of all injections in first injection unit of of a plurality of models or combination and different or the combinations that comprise a plurality of models; And

By relatively obtaining as the degree of deviation between the summation of drawdown parameter.

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